Lecture 9-High Level Waste Management
-
Upload
albania-energy-association -
Category
Education
-
view
173 -
download
4
description
Transcript of Lecture 9-High Level Waste Management
Jump to first page
High Level Waste Management
Chapter 10
Section 3
Dr. John Ringle
NE 112
Jump to first page
I. Radioactive Waste
A. Classification & Characteristics of Radioactive Waste
B. Quantities of Waste
C. Sources of WasteD. Current Location
Jump to first page
II.Radioactive Waste Management
A. PrinciplesB. ResponsibilityC. HLW - Disposal OptionsD. HLW Acts - CongressE. Characteristics of a Good
Geologic RepositoryF. Hazards of Deep Geologic
DisposalG. HLW Activity in Other CountriesH. LLW -Disposal OptionsI. Hazards of LLW DisposalJ. LLW Acts - CongressK. LLW Activity in Other CountriesL. TRU Waste Disposal
Jump to first page
I. Radioactive WasteA. CLASSIFICATION &
CHARACTERISTICS OF RADIOACTIVE WASTE
CLASS
DEFINITION
CHARACTERISTICS
High Level Waste (HLW)
fission and activation products resulting from reprocessing of spent fuel
high heat, high γ activity, fairly short tH
SPENT FUEL (SF)
non-reprocessed spent fuel
high heat, high γ activity, α emitters; fairly short tH for γ, long tH for α
Transuranic (TRU)
Z > 92 tH > 20 yr Act. > 100 nCi/g
low heat, α emitters, long tH
Mill tailings
residue of U mills
natural radioactivity, Ra & Rn, α emitters
Low Level Waste (LLW)
all else - none of the above
low heat, moderate γ activity, short tH
Defense vs. Commercial waste - depends on the origin of the waste and the nature of the activity that created the waste
Jump to first page
Jump to first page
Jump to first page
Jump to first page
Jump to first page
B. QUANTITIES OF WASTE (as of 12-31-96)
TYPE
VOLUME (m3)
ACTIVITY (MCi)
DEPTH ON FOOTBALL FIELD (ft.)
HLW - Commercial
2000
23.6
1.6
HLW - Defense
345,350
878
254
SF - Commercial
13,808
30,000
10.3
SF - Defense
1091
n.a.
0.85
TRU - Defense
238,000
2.74
174
LLW - Commercial
1.75 x 106
5.1
1286
LLW - Defense
3.39 x 106
12.1
2500
Mill Tailings
119 x 106
n.a.
87,600
Jump to first page
C.SOURCES OF WASTE
HLW - Defense
Hanford; Savannah River (SR), SC; Idaho National Engineering Lab (INEL)
HLW - Commercial
none recently; formerly produced at West Valley, NY
SF - Defense
none (fuel is reprocessed)
SF - Commercial
Civilian power plants around U.S.
TRU - Defense
Hanford, SR, INEL, Rocky Flats
TRU - Commercial
none
LLW - Defense
Hanford, SR, INEL
LLW - Commercial
power plants, industry, hospitals, universities around U.S.
Jump to first page
D.CURRENT LOCATION HLW - Defense
stored at Hanford, SR, INEL; vitrify and transfer to commercial repository ~ 2010
HLW - Commercial
West Valley, NY; vitrify and transfer to commercial repository ~ 2010
SF - Commercial
stored at power plants; transfer to commercial repository ~ 2010
TRU - Defense
stored at Hanford, SR, INEL, Rocky Flats; transfer to Waste Isolation Pilot Plant (WIPP), NM ~ March 1999
LLW - Defense
Hanford, SR, INEL, Oak Ridge, Los Alamos
LLW - Commercial
2 sites now: Hanford; Barnwell, SC In a few years: 2-5 regional sites (?)
Mill Tailings
No operational mills; 6 mills on standby status. 26 total tailings storage areas in western U.S.
Jump to first page
II. RADIOACTIVE WASTE MANAGEMENT
A. PrinciplesB. ResponsibilityC.HLW - Disposal OptionsD. HLW Acts - CongressE.Characteristics of a Good
Geologic RepositoryF.Hazards of Deep Geologic
DisposalG. HLW Activity in Other
CountriesH. LLW -Disposal OptionsI. Hazards of LLW DisposalJ. LLW Acts - CongressK. LLW Activity in Other
CountriesL.TRU Waste Disposal
Jump to first page
II. RADIOACTIVE WASTE MANAGEMENT
A. PRINCIPLES • Time • Isolation (Distance, Shielding)B. RESPONSIBILITY • U.S. Government: HLW, TRU,
Spent Fuel, defense LLW • States: Commercial LLWC. HLW -- DISPOSAL OPTIONS1. Deep geologic repositories2. Subseabed3. Space4. Ice sheet5. Transmutation6. Very deep hole7. Island burial
Jump to first page
D. HLW ACTS -- CONGRESS
NUCLEAR WASTE POLICY ACT OF 1982
NUCLEAR WASTE POLICY AMENDMENTS ACT OF 1987
Deep geologic disposal chosen
same
2 repositories: 1 in Western U.S.
1 in Eastern U.S.
1 repository: Yucca Mtn.,
Nevada
Fee: 1 mill/kWhr
reviewed annually
same
Timetable: 1st repository
begins accepting waste by 1998
fuel acceptance delayed (to ~2010)
MRS - If Congress says yes
MRS - yes
Financial incentive to states with MRS or repository: None
Financial incentive:
$10 M/yr for MRS $20 M/yr for repository
DOE designs & builds repository
same
NRC licenses repository
same
EPA sets radioactive release limits
same
Jump to first page
E. CHARACTERISTICS OF A GOOD GEOLOGIC REPOSITORY
Very little (or no) groundwater in host rock.
Slow water travel time in host rock.
Low seismic activity. Non-corrosive environment. High absorptive properties for
radionuclides. Good heat dissipation
characteristics. Strong enough to support mining
activity. Few fractures or cracks. No commercial interest in host
rock. Isolated area. Dry climate.
Jump to first page
F. HAZARDS OF DEEP GEOLOGIC DISPOSAL
Transportation of HLW or SF to repository Shipping casks very important
Release to ground water. Barriers:
Waste form (glass or ceramic) Waste canister (metal) Backfill (host rock/clay) Host rock
Jump to first page
G. HLW ACTIVITY IN OTHER COUNTRIES
Reprocess HLW disposal Argentina, Belgium, Brazil, China,
France, Germany, India, Italy, Japan, Netherlands, Spain, Switzerland, United Kingdom, former USSR states
No reprocessing SF disposal Canada, Sweden, United States
Storage of HLW (vitrified) or SF in water or dry storage
Investigate geological repositories
Jump to first page
Jump to first page
Jump to first page
Jump to first page
Waste Package for 21 Pressurized Water Reactor Uncanistered Fuel Assemblies
Jump to first page
Waste Package for Five-Canister, Defense High-Level Radioactive Waste/DOE-Owned Spent Nuclear Fuel Assembly
Jump to first page
Emplacement Drift Section at Waste Package Support Location
Jump to first page
Engineered Barrier System Options for the Viability Assessment
Jump to first page
Jump to first page
Jump to first page
Jump to first page
H. LLW -- DISPOSAL OPTIONS
1. Shallow-land burial. 2. Earth-mounded tumulus. 3. Concrete structures—
above grade & below grade.
4. Deep trenches. 5. Augered shaft. 6. High-integrity container. 7. Hydrofracture. 8. Underground mines &
rock cavities.
Jump to first page
I. HAZARDS OF LLW DISPOSAL
1. 1. Transportation of LLW to disposal site.
2. 2. Leakage of LLW via groundwater.
3. 3. Inadvertent intrusion.
Jump to first page
J.LLW ACTS -- CONGRESS
LOW LEVEL WASTE POLICY ACT OF 1980
LOW LEVEL WASTE POLICY AMENDMENTS ACT OF 1985
LLW disposal is a state, not federal responsibility
same
Encouraged states to join together in regional compacts to deal with LLW
same
By 1-1-86, each state shall have disposal mechanism in operation to handle its LLW.
By 7-1-86, non-compact state must ratify compact or enact legislation to provide for operation of instate LLW facility by 1-1-93. By 1-1-88, compacts or states must select LLW sites. By 1-1-90, license application must be filed for LLW facilities. By 1-1-93, access to existing LLW facilities ceases for states outside of the 3 compacts operating these sites. From 1986-1992, existing sites can charge increasing surcharges to waste from outside the compact. Rebates (25% of surcharge) returned to states or compacts meeting above deadlines.
Jump to first page
K. LLW ACTIVITY IN OTHER COUNTRIES
Very similar to U.S. Many using shallow-land
burial. France -- earth-mounded
tumulus. Canada -- augered shafts. W. Germany --
underground mine. Sweden, Canada, Finland,
Britain -- rock cavities.
Jump to first page
L. TRU WASTE DISPOSAL
Very similar in most aspects to HLW disposal.
Repository is selected and constructed: Waste Isolation Pilot Plant, near Carlsbad, NM.
Repository is 2150 ft. below surface in bedded salt.
Test phase of WIPP started in 1994.
Repository began accepting TRU waste March 1999.
Jump to first page
Jump to first page
Jump to first page
Jump to first page
Jump to first page
Jump to first page