camm 605029

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... .... ENGINEERING CHANGE NOTICE Page 1 o f ; L

I2a. Mod i f i ca t ion Work 12b. Work Package 12c. Mod i f i ca t ion York C n p l e t e No.

3. O r i g i n a t o r ' s N a , Organization, WIN, 4. US4 Required? 5. Date

[ ] yes [ X I NO August 7, 1996

Change ECN 6. Pro jec t Title/No./Work Order No. 7. Bldg./Sys./Fac. No. 8. Approval Deslgnator Temporary

Supersedure Cancel/Void

i! I:

Standby t1 TWRS FSAR 9. D o c m n t N u ' h r s Changed by t h i s ECN

(includes sheet no. and rev.) 10. Related ECN NoCS). 11. Related PO NO.

12d. Restored t o O r i g i n a l C w d i - t i o n (Tenp. o r S t a m ECN only)

!. ECN Category 3. O r i g i n a t o r ' s N a , Organization, WIN, 4. US4 Required? 5. Date (mark one) and Telephone NO. 8n 100 supplemental. $ $ Change ECN Temporary Standby TWRS FSAR Supersedure Cancel/Void

B r e t t D. Board, TWRS SAR [ ] yes [ X I NO August 7, 1996 Engineering, A3-37, 376-8422 > Di rec t Revision

7. Bldg./Sys./Fac. No. 8. Approval Designator i! t1

I: 6. Pro jec t Title/No./Work Order No.

9. D o c m n t N u ' h r s Changed by t h i s ECN (includes sheet no. and rev.)

10. Related ECN NoCS). 11. Related PO NO.

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[ X I No (NA Elks. 12b. 12b)

12c. 12d) Design Authority/Cog. Engineer

Signature b Date Design Authority/Cog. Engineer

Signature b Date

14a. J u s t i f i c a t i o n (mark one) C r i t e r i a Change [ ] Design lnprovenent [ X I E n v i r o m n t a l [ ] F a c i l i t y Deact iva t ion [ ] Rs-Found [ ] F a c i l i t a t e Const [ ] Cowt. E r r o r l m i s s i o n [ ] Design Error/Qnission [ ] 14b. J u s t i f i c a t i o n D e t a i l s Prov ide t e c h n i c a l b a s i s f o r c o n t r o l s .

15. D i s t r i b u t i o n ( inc lude name, WSIN, and no. of copies) B . D. Board A3-37 E. R. Bruschi A2-34 D. S. Leach A3-34 J. L. Stewar t A2-26 Centra l F i l e s A3-88 STA

- SRP P r o j e c t F i l e s A2-26 IS

I I I

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SDDlDD

Functional Dosign Criteria

Operating Specification

Criticality Specificmion

Conceptual Design Rspon

Equipment Spec.

c0n.t. spec.

Procurement Spec.

Vendor Infomation

OM Manual

FSARISAR

Safety Equipment List

Radiation W o k Pemn

Environmental Impact Statsmsnt

Environmental Repon

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SsisrnblStmm Analysis

StnWD..ign Rapon

Intsrtacs Control Drawing

Calibntion Rocedum

inmailmion Rocadurn

Maintoname FTocsdun

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Opsrming Inmwtbn

Opeminp Rocsdun

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IEFD Drawing

Coli Arrangomont Drawinp

Essential Matarid Specification

Fac. Roc. Samp. Schedule

Inspection Flm

inventory Adjummant Rsqusm

Tank CalibntPn Manual

Health Physk. Rooodum

Spars. Multiple Unil Limine

Tem Roc~d"m.ISp~ElfiE.tiOn

Componem Index

ASME Coded nom Human Factor Conrideration

Computer Softwam

Electtrio Circuit SEhedule

iCRS Rocadum

Process Control ManuaIlPIan

Rocsss Flow Chart

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k k i e r File

..

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ind ica te that the s ign ing organ iza t ion has been n o t i f i e d of other affected d o c w n t s l i s t e d belou. Docunent Nur&r/Revision Docunent Nur&r/Revision Docunent N u h e r Revision

21. Approvals

Design Author i ty

Cog. Eng. E. D. Board

Cog. Mgr. S. M. Stahl

QA

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Signature

d Date Signature

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WHC-SD-WM-CN-043, Rev. 1

TANK BUMP CONSEQUENCE ANALYSIS

Brett D. Board Westinghouse Hanford Company Richland, WA 99352 U.S . Department o f Energy Contract DE-AC06-87RL10930

EDT/ECN: 605029 Org Code: 8M100 B&R Code: EW3120071

UC: 510 Charge Code: NlFC3 Total Pages: mq

kd. Key Words: bump, radiological, toxicological, c nse uence, thermal rollover, heat up, temperature, GOTH', t2nk farm, FSAR, cover block decontamination factor

Abstract: The purpose of this document is to derive radiological and toxicological consequences for a tank bump event based on analysis performed using the GOTH' computer model, to estimate the mitigative effect of pump and sluice pit cover blocks, and to discuss preventative measures.

'GOTH is a trademark of JMI, which is derived from GOTHIC - a registered trademark of the EPRI Corp. of California.

TRADEMARK DISCLAIMER. t rade name, trademark, manufacturer, o r otherwise, does not necessar i ly cons t i t u te o r inply i t s endorsnnent, recunnendation, or favor ing by the Uni ted States C o v e r m n t o r any agency thereof o r i t s contractors o r subsontractors.

P r in ted i n the Uni ted States of America. Docunent Contro l Services, P.O. Box 1970, Mai ls top H6-08. Richland UA 99352, Phone ( 5 0 9 ) 372-2420; Fax ( 5 0 9 ) 376-4989.

Reference here in t o any s p e c i f i c c m r c i a l product, process, o r serv ice by

To Obtain copies of t h i s docunent, contact: UHC/Bcs

8 h h Date Release stam,

Approved for Public Release

A-6400-073 (10195) GEF321

(1) DocMent Nunber

1 RS

RECORD OF REVISION

( 7 ) Revise’analysis, complete revision per ECN #605029

I WHC-SD-WM-CN-043, I Page I I Rev. 1

CHANGE CWTROL RECORD Authorized for Release (3) Revision (4 Description of Cha e - Re Lace, Add, and Delete Pages

0 ! €.dT-6&<&, 7,?!?3/Qf (5) Cog. Engr. I (6) Cog. Mgr. Date

11-7320-005 (08/91) UEF168

WHC-SD-WM-CN-043, Rev. 1

TANK BUMP CONSEQUENCE ANALYSIS

B r e t t 0. Board Westinghouse Hanford Company

Richland, Washington

August 1996

1 o f 18

WHC.SD.WM.CN.043, Rev . 1

Table o f Contents

1.0

2 .0

3 . 0

4 . 0

5 . 0

6 . 0

7.0

8.0

Purpose . . . . . . . . . . . . . . . . . . . . . . . . . Methodology . . . . . . . . . . . . . . . . . . . . . . . . . . . . Assumptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 . 1 Tankwaste . . . . . . . . . . . . . . . . . . . . . . . . . 3.2 GOTHHodel . . . . . . . . . . . . . . . . . . . . . . . . . 3.3 M i t i g a t i o n . . . . . . . . . . . . . . . . . . . . . . . . . Input Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 . 1 Unmitigated Consequences . . . . . . . . . . . . . . . . . .

5 . 1 . 1 Radiological . . . . . . . . . . . . . . . . . . . . . 5.1 .2 Toxicological . . . . . . . . . . . . . . . . . . . . .

5.2 Cover Block Decontamination Factor . . . . . . . . . . . . . 5 . 3 Mi t igated Consequences . . . . . . . . . . . . . . . . . . .

5 . 3 . 1 Radiological . . . . . . . . . . . . . . . . . . . . . 5.3 .2 Toxicological . . . . . . . . . . . . . . . . . . . . .

5.4 Rate of Temperature Rise . . . . . . . . . . . . . . . . . . Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 . 1 Consequences . . . . . . . . . . . . . . . . . . . . . . . . 6.2 SST Temperature L i m i t . . . . . . . . . . . . . . . . . . . . 6 . 3 DST Temperature L imi ts . . . . . . . . . . . . . . . . . . . Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . References . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Appendix A . Decontamination Factor Calculations . .

4

4

4 4 5 5

6

6 6 6 9 9

11 11 11 11

12 12 13 13

13

14

15

2 o f 18

Table 1 . Table 2 . Table 3 . Table 4 . Table 5 . Table 6 . Table 7 . Table 8 .

WHC.SD.WM.CN.043, Rev . 1

Tank 101-AZ Waste Parameters . . . . . . . . . . . . . . . . . 4 Waste Released by GOTH Model . . . . . . . . . . . . . . . . . . 6

Unmit igated Tox ico log ica l Consequences . . . . . . . . . . . . 9 M i t i g a t e d Rad io log ica l Consequences . . . . . . . . . . . . . . 11 M i t i g a t e d Tox ico log ica l Consequences . . . . . . . . . . . . . 11 Rate o f Temperature Rise For Selected Single-Shel l Tanks . . . 12 Comparison o f Consequences t o Risk Guidel ines . . . . . . . . . 13

Unmit igated Rad io log ica l Consequences . . . . . . . . . . . . . 9

3 o f 18

WHC-SD-WM-CN-043, Rev. 1

TANK BUMP CONSEQUENCE ANALYSIS

1.0 Purpose

The purpose o f t h i s document i s t o d e r i v e r a d i o l o g i c a l and t o x i c o l o g i c a l consequences f o r a tank bump event based on a n a l y s i s performed us ing t h e GOTH computer model (Sathya 1996), t o es t ima te t h e m i t i g a t i v e e f f e c t pump and s l u i c e p i t cover b locks, and t o d iscuss p r e v e n t a t i v e measures.

2.0 Methodology

Rad io log i ca l and t o x i c o l o g i c a l consequences are c a l c u l a t e d w i t h t h e methodology developed f o r use i n t h e Tank Waste Remediation System F i n a l Safety Ana lys i s Report. i n t o r a d i o l o g i c a l and t o x i c o l o g i c a l consequences. The GOTH computer model p rov ides da ta i n mass u n i t s . conversions based on t h e assumptions l i s t e d i n Table 1.

Th is methodology conver ts a volume o f waste m a t e r i a l

Volume u n i t s are de r i ved through s imple

The m i t i g a t i v e e f f e c t o f cover b locks i s c a l c u l a t e d by t h e r a t i o o f expected tank bump aerosol l o a d i n g t o t h e t h e r o e t i c a l maximum aerosol l oad ing .

P reven ta t i ve measures are based on i n t e r p o l a t i o n o f h i s t o r i c a l data.

3.0 Assumptions

3.1 Tank Waste

The tank headspace i s assumed t o be a i r w i t h a q u a n t i t y o f ae roso l i zed aging waste l i q u i d s en t ra ined i n i t due t o aerodynamic re-suspension. p a r t i t i o n f r a c t i o n o f i s considered bounding (Voice 1994). The e n t i r e headspace volume i s assumed t o be d i sp laced d u r i n g t h e tank bump event.

A

Table 1. Tank 101-A2 Waste Parameters (Sathya 1996).

Tank Contents:

Undissolved (d ry ) S o l i d s Dens i t y Aqueous S o l u t i o n Dens i t y 75.5 l b m / f t 3

243.4 l b m / f t 3

S a t u r a t i o n temperature o f t h e l i q u i d waste i s between 105°C (220°F) and 110°C (230°F) a t atmospheric pressure and increases w i t h increased h y d r o s t a t i c head. temperature t h e waste d e n s i t y i s conse rva t i ve l y assumed t o match water . Temperature va lues are then i n t e r p o l a t e d f rom standard steam tab les .

To c a l c u l a t e t h e e f f e c t s o f h y d r o s t a t i c head on t h e s a t u r a t i o n

4 o f 18

WHC-SD-WM-CN-043, Rev. 1

Tank waste i s assumed t o heat up l i n e a r l y w i t h t ime upon l o s s o f a c t i v e v e n t i l a t i o n . T h i s i s conse rva t i ve i n t h a t t h e r a t e o f heat l o s s f rom t h e tank t o t h e s o i l i s expected t o increase as t h e temperature increases.

3.2 60TH Model

The GOTH computer a n a l y s i s modeled t h e tank as a sealed con ta ine r w i t h two openings i n o rde r t o model t h e v e n t i l a t i o n system header and t h e i n f i l t r a t i o n pathways. Both openings were assumed t o be s imple r i s e r s open t o atmospheric pressure w i t h a p a r t i c u l a r l o s s c o e f f i c i e n t . pathways opening was assumed t o be l o c a t e d a t t h e c e n t e r o f t h e tank w h i l e t h e vent header opening was s e t o f f center . Several d i f f e r e n t s i zes of these openings were considered i n o rde r t o s imu la te t h e d i f f e r e n t p o s s i b l e t a n k c o n f i g u r a t i o n s (e.g., pump/sluice p i t s w i t h and w i t h o u t cover b locks ) .

The re lease q u a n t i t i e s prov ided by t h e GOTH computer model had two d i s t i n c t components. dynamics; t h a t i s , t h e event produced f l u i d v e l o c i t i e s such t h a t t h e waste i s c a r r i e d o u t t h e open r i s e r due t o momentum. re lease due t o p r e s s u r i z a t i o n e f f e c t s ; t h a t i s , t h e tank headspace pressure becomes p o s i t i v e w i t h respec t t o atmospheric which fo rces waste o u t o f t h e tank t o a r e g i o n o f lower pressure. I n r e a l i t y , t h e tank r i s e r s are covered w i t h e i t h e r equipment (e.g., pumps) o r f l anges t h a t are b o l t e d i n p lace. o n l y pathway i s through t h e p i t d r a i n l i n e s . These l i n e s come i n t o t h e main r i s e r s a t a 90" angle and i n c l u d e another 90" bend between t h e r i s e r and t h e p i t . Because o f these two bends, very l i t t l e o f t h e f l u i d dynamic p o r t i o n o f t he re lease i s a c t u a l l y expected. I n c l u s i o n o f f l u i d dynamics, t h e r e f o r e , i s conservat ive.

The i n f i l t r a t i o n

The f i r s t component i s t he re lease due t o f l u i d

The second component i s t h e

The

As expected, most o f t h e s imulated bumps occured i n t h e cen te r o f t h e

One s imu la t i on , however, r e s u l t e d i n a bump t h a t was s l i g h t l y

tank. Therefore, most o f t h e c a l c u l a t e d re leases i n c l u d e a s t r o n g f l u i d dynamic c o n t r i b u t o r . o f f - c e n t e r . re lease pa th f o r t h i s s i m u l a t i o n the f l u i d dynamic p o r t i o n o f t h e re lease was s i g n i f i c a n t l y reduced. Th is r e s u l t matches ac tua l t ank c o n f i g u r a t i o n c l o s e l y and was, t he re fo re , used f o r consequence c a l c u l a t i o n s .

3.3 M i t i g a t i o n

be 1 g/m3. metastable concen t ra t i on o f a f o g (10 mg/m ) b u t i s c o n s i s t e n t w i t h t h e l i q u i d water con ten t i n n a t u r a l c louds ( S u t t e r 1982).

The h ighes t f l u i d v e l o c i t i e s are produced d i r e c t l y above t h e tank bump.

Because t h e h i g h f l u i d v e l o c i t i e s were n o t d i r e c t l y under a

The maximum concen t ra t i on o f en t ra ined l i q u i d i n a vapor i s assumed t o Th is i s two o rde rs o f magnitudq more conserva t i ve than t h e

Cover b locks are assumed t o a f f e c t t h e l i q u i d and s o l i d aerosols en t ra ined i n t h e escaping steam. water vapor t h a t p rov ides l i q u i d and s o l i d aerosol t r a n s p o r t b u t con ta ins no o t h e r r a d i o a c t i v e o r t o x i c cons t i t uen ts . assumed t o t r a v e l around cover b locks unimpeded.

The escaping steam i s assumed t o be pure

Headspace gas and water vapor i s

5 o f 18

WHC-SD-WM-CN-043, Rev. 1

Vapor Released

Resp i rab le L i q u i d Released

Resp i rab le Sol i d s Released

740 lbm

56 lbm

1 lbm

5.0 C a l c u l a t i o n s

5.1 Unmi t iga ted Consequences

components: gas, r e s p i r a b l p l i q u i d , and r e s p i r a b l e s o l i d s . taken t o be a f i x e d 1,900 m (Hodgson 1996). Th i s i s based on t h e assumption t h a t t h e e n t i r e headspace volume w i l l be d isp laced by t h e t a n k bump pressure t r a n s i e n t . and converted w i t h t h e assumptions i n Table 1.

Consequences are c a l c u l a t e d by summing up t h e consequences o f t h ree The gas volume i s

The l i q u i d and s o l i d q u a n t i t i e s a re based on t h e values i n Table 2

5.1.1 R a d i o l o g i c a l . Ons i te r a d i o l o g i c a l dose c a l c u l a t i o n s a re found w i t h t h e f o l l o w i n g equat ion.

6 o f 18

WHC-SD-WM-CN-043, Rev. 1

therefore

vBas = (1900 m 3 gas) [ 1000- i3] [ 10-3;;;y]

= 1.9 x L liquid

Dgasonsite = ( 1 . 9 x L liquid) 3.41 x 1 0 9 i 3.3 x 10 - 1420 _.__ [ m 3 ] [ .?] [ L 7&d] ,

= 3 . 0 x l o 4 SV

"Liquid = 7bm 75.5- f t 3

= 21.0 L liquid

DLiwid = (21.0 L liquid) 3.41 x 1 0 - 2 L 3 . 3 x 10 - 1420 - [ [ 4?] [ = 3.4 x lo- ' sv

= 0.12 L solid

sv Dsolid onsite = (0.12 L solid)

= 2.2 sv

7 o f 18

WHC-SD-WM-CN-043, Rev. 1

The o f f s i t e dose i s found similarly but includes an injestion term and a

different - . X Q

therefore

D,,, offsite = (1.9 x lo-* L liquid) 2.83 x lo”? I ..I = 3.0 x sv

Dliquid offsite = (21.0 L liquid) 2.83 x 10”f [ m31 [[3.3 x lo4<] 1420 -1 + [0.092$$]]

= 3.3 x 1 0 4 sv

Dsolid offsite = (0.12 L solid) 2.83 x l O ” f I m31 [ [3.3 x IO4:] p . 7 x l o 6 -1 + [8.1%]]

= 1.9 x io5 sv

8 of 18

WHC-SD-WM-CN-043, Rev. 1

Ons i te O f f s i t e

Gas Dose 3.0 E-04 SV 3.0 E-07 SV

L i q u i d Dose 3.4 E - 0 1 SV 3.3 E-04 SV

S o l i d s Dose 2.2 E+OO Sv 1.9 E-03 SV

Tota l Dose 2.5 E+OO Sv 2.2 E-03 SV I

5 .1 .2 T o x i c o l o g i c a l . T o x i c o l o g i c a l consequences f o r s h o r t d u r a t i o n events such as t h e t a n k bump are found by m u l t i p l y i n g t h e t o t a l q u a n t i t y re leased by t h e appropr ia te sum-of- f ract ions number. normal ized consequence, i .e., values g r e a t e r than one i n d i c a t e consequences above e v a l u a t i o n g u i d e l i n e s . 4.

The r e s u l t i s a

The values chosen and t h e r e s u l t s a re i n Table

5.2 Cover B l o c k Decontaminat ion Fac tor

I f t h e cover b locks a re no t i n p lace then t h e escaping waste i s re leased d i r e c t l y t o t h e atmosphere. The cover b locks a c t as a s t a g n a t i o n p l a t e t o t h e escaping waste stream and promote l i q u i d r a i n ouf. Steam e n t e r s t h e pump o r s l u i c e p i t s w i t h a h igh l i q u i d d e n s i t y (>> 1 g/m ) and fo rces any e x i s t i n g a i r ou t . The pressure i n a g iven p i t then r i s e s u n t i l t h e steam f l o w i n t o t h e p i t equates t o t h e f l o w ou t o f t he p i t . Flow ou t o f t h e p i t i s l i m i t e d t o a

9 o f 18

WHC-SD-WM-CN-043, Rev. 1

That i s , l i q u i d w i l l remain e n t r a i n e d i n t h e steam l i q u i d l o a d i n g o f 1 g/m3. u n t i l t h e e n t r a i n e d l i q u i d d e n s i t y i n t h e p i t volume reaches t h e maximum (1 g/m3). A t t h a t p o i n t t h e excess l i q u i d w i l l r a i n ou t and d r a i n back t o t h e tank. The r a t i o o f t h e e n t r a i n e d l i q u i d and t h e maximum e n t r a i n e d l i q u i d i s t h e decontaminat ion f a c t o r .

Steam e n t e r s t h e sealed pump and s l u i c e p i t s a t an average pressue o f 15 ps ia . i n d i c a t e s t h a t 740 l b o f steam i s re leased over 80 seconds. The r a t e o f steam r e l e a s e i s g i v e n by

The s p e c i f i c volume o f t h i s steam i s , t he re fo re , 26.29 f t 3 / l b . GOTH

GOTH a lso i n d i c a t e s t h a t 56 l b o f tank l i q u i d i s re leased over the same du ra t i on . The r a t e o f l i q u i d re lease i s g i v e n by

lbm - lll l iquid (lbm) mliquid [TI- t (5)

The mass l o a d i n g o f l i q u i d i n t h e steam i s g i v e n by

The decontaminat ion f a c t o r i s then

lbrn l i q u i d

DF =

DF i s found t o be 46. The numeric c a l c u l a t i o n s are i n appendix A.

10 o f 18

WHC-SD-WM-CN-043, Rev. 1

Q u a n t i t y Gas 1,900 m3

L i q u i d 0.46 L Sol i d s 2.5 E-03 L

Sum T o t a l

O n s i t e Dose O f f s i t e Dose

3.0 E-04 SV 3.0 E-07 SV

7.4 E-03 SV 7.2 E-06 SV

4.8 E-02 SV 4.1 E-05 SV

5.6 E-02 SV 4.9 E-05 SV

11 o f 18

Q u a n t i t y Ons i te 1,900 m3 5.3 E+03

L i q u i d 0.46 L 1.0 E+02

Sol i d 2.5 E-03 L 2.4 E+OO

Sum T o t a l 5.4 E+03

Gas

O f f s i t e

1.7 E-02

1.5 E-02

1.3 E-04

3.2 E-02

WHC-SD-WM-CN-043, Rev. 1

U I u nbKC-106 110,000 -

h

"F BTU - -day

h

= 3 x 1 0 4

Table 7 l i s t s severa l tanks and t h e i r c a l c u l a t e d r a t e o f temperature r i s e f rom t h i s method.

Tank 241-AZ-101 has been c a l c u l a t e d t o heat up a t approx imate ly 0.5"C/day (0.9"F lday) (Sathya 1994). because i t s heat l o a d i s double t h a t o f any o t h e r DST.

6.0 Resu l t s

6.1 Consequences

o n s i t e consequences are above r i s k g u i d e l i n e s f o r a l l cases. are summarized i n Table 8.

Th is tank i s bounding f o r a l l DSTs

O f f s i t e consequences are below r i s k g u i d e l i n e s f o r a l l cases. However, These r e s u l t s

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6.2 SST Temperature L i m i t

t ake t a n k 241-C-106 ( the bounding case) approximately 30 days t o r a i s e f rom 99'C (210°F) t o 105" (220'F) upon a l o s s o f a c t i v e v e n t i l a t i o n . The o t h e r SSTs would take cons iderab ly longer . Therefore, assuming a temperature l i m i t o f 99°C (210°F) a l lows approximately one month t o take c o r r e c t i v e a c t i o n upon a system upset b e f o r e s i g n i f i c a n t steam genera t ion would occur.

6.3 DST Temperature L i m i t s

Based on t h e c a l c u l a t e d heat up o f t a n k 241-AZ-101 (0.9"F/day), i t would take approximately 25 days f o r t h e t a n k temperature t o inc rease 12'C (20'F). Therefore, i n o r d e r t o a l l o w approximately one month t o t a k e c o r r e c t i v e a c t i o n upon a system upset ( t he same t ime span s p e c i f i e d f o r t h e SSTs) a temperature l i m i t o f 93°C (200°F) must be assumed. Most DSTs a l so c o n t a i n a l a r g e h y d r o s t a t i c head. A t 4.6 m (15 ft) o f h y d r o s t a t i c head t h e s a t u r a t i o n temperature increases approximately 12°C (20°F). Therefore, a h i g h e r a l lowab le temperature o f 105°C (220°F) can be assumed a t waste depths g r e a t e r than 4.6 m (15 f t ) .

Based on t h e i n f o r m a t i o n presented i n Table 7, i t would c o n s e r v a t i v e l y

7.0 Conclusion

themselves t o adequet ly p r o t e c t t h e o n s i t e worker. consequences below r i s k g u i d e l i n e s i s t o p revent t h e t a n k bump.

temperatures below t h e l o c a l s a t u r a t i o n temperature o f t h e l i q u i d waste. I f t h e waste i s no t al lowed t o s a t u r a t e then no steam can form and t h e event i s prevented.

Cover b locks are an e f f e c t i v e m i t i g a t o r b u t a re n o t s u f f i c i e n t by The o n l y way t o b r i n g

Prevent ion o f t h e t a n k bump can be accomplished by m a i n t a i n i n g waste

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8.0 References

Hodgson, K. M., Anantatmula, R. P., Barker, S. A., Fowler, K. D., Hopkins, J. D., Leche l t , J. A., Reynolds, D. A., Hedengren, D. C., S tou t , R. E., Winward, R. T., 1996, E v a l u a t i o n o f Hanford Tanks f o r Trapped Gas, WHC-SD-WM-ER-526, Rev. 1, Westinghouse Hanford Company, R i c h l and, Washington.

WHC-SD-WM-SARR-010, Rev. 1, Westinghouse Hanford Company, R ich l and, Washington.

Sathyanarayana, K., F ryer , B. C., Thurgood, M. J., 1994, Summary Report: Thermal H y d r a u l i c S a f e t y A n a l y s i s o f Aging Waste Tank 101-AZ, WHC-SD-WM-ER-335, Westinghouse Hanford Company, R i c h l and, Washington.

Sathyanarayana, K., F ryer , B. C., 1996, E v a l u a t i o n o f P o t e n t i a l and Consequences o f Steam Bump i n High Heat Waste Tanks and Assessment and Val i d a t i o n o f GOTH Computer Code, WHC-SD-WM-CN-022, Westinghouse Hanford Company, Richland, Washington.

C h a r a c t e r i s t i c s -- A Review o f Background I n f o r m a t i o n , NUREG/CR-2651, PNL-4154, P a c i f i c Northwest Laboratory, Richland, Washington.

Systems, WHC-SD-WM-SARR-018, Westinghouse Hanford Company, Richland, Washington.

Kummerer, M., 1995, Heat Removal C h a r a c t e r i s t i c s o f Waste Storage Tanks,

Su t te r , S. L., 1982, Accident Generated P a r t i c u l a t e m a t e r i a l s and T h e i r

Voice, J. D., 1994, Tank Farm Acce lera ted S a f e t y Ana lys is : Tank V e n t i l a t i o n

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Appendix A - Decontamination Factor Calculations

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Decontamination Effect of Pump Pit Cover Blocks on Tank Bump Release

Calculations performed by Mathematica for Windows* - Standard Version 2.2 Initialize for EnglishlMetric Conversions

rn Code Verification <ascellaneous'Units'

Please Note:

SI[1 Pound] 0.45359237 Kilogram SI [l Foot"31

The cormnand "SI[expr]" converts unlts to the SI system.

3 0.0283168 Meter SI [ 1 Pound/Foot"3 1 16.0185 Kilogram

3 Meter

Assumptions Please Note: The semicolon following a conunand suppre

maxDensity=l Gram/Meter"3 (liquid/steam) ;

GOTH Output averageAbsolutePressure=15 PoundForce/Inch"2; steamDensity=1/26.29 Pound/Foot"3; liquidReleased=56 Pound liquid; steamReleased=740 Pound steam; solidReleased=l Pound solid; bumpDuration=80 Second;

s output.

*Windows i s a trademark o f Microsoft Corporation

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Calculations Please Note: The command "N[expr]" forces a numerical (rather than a

symbolic) solution.

steamVolume=steamReleased/steamDensity 3

1 9 4 5 4 . 6 Foot s t e a m steamRate=steamVolume/bumpDuration

2 4 3 . 1 8 2 Foot s t e a m

S e c o n d

3

liquidRate=N[liquidFteleased/bumpDurationl 0 . 7 l i q u i d P o u n d

S e c o n d mas sLoading=SI [ liquidRate/ s teamRate 1 0 . 0 4 6 1 0 9 1 Kilogram l i q u i d

3 Meter s t e a m

deconFactor=SI [massLoading/max!Jensityl 4 6 . 1 0 9 1

.

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CHECKLIST FOR PEER REVIEW

Document Reviewed: Tank Bump Consequence Analysis, WHC-SO-WM-CN-043

Yes No NA [ X I [ ] [ ] *

this review, with no’gaps. Problem completely defined. Accident scenarios developed in a clear and logical manner. Necessary assumptions explicitly stated and supported. Computer codes and data files documented. Data used in calculations explicitly stated in document. Data checked for consistency with original source information as applicable. Mathematical derivations checked including dimensional consistency of results. Models appropriate and used within range of validity or use outside range of established validity justified. Hand calculations checked for errors. should be treated exactly the same as hand calculations. Software input correct and consistent with document reviewed. Software output consistent with input and with results reported in document reviewed. Limits/criteria/guidelines applied to analysis results are appropriate and referenced. Limits/criteria/guidelines checked against references. Safety margins consistent with good engineering practices. Conclusions consistent with analytical results and applicable 1 imits. Results and conclusions address all points required in the problem statement. Format consistent with appropriate NRC Regulatory Guide or other standards Review calculations, comments, and/or notes are attached.

Spreadsheet results

* Any calculations, comments, or notes generated as part of this review should be signed, dated and attached to this checklist. labeled and recorded in such a manner as to be intelligible to a technically qual if ied third party.

Such material should be

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