ML19340A265
| ML19340A265 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 08/29/1976 |
| From: | Eisenhut D Office of Nuclear Reactor Regulation |
| To: | Goller K Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML19340A266 | List: |
| References | |
| NUDOCS 8001310613 | |
| Download: ML19340A265 (3) | |
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MDORANDUH FOR:
K. R. Collar, Assistant Director for Operating Reactors, DOR FROM:
D. G. Eisenhut, Assistant Director for Operational Tech-nology, DCP.
SUBJECT:
OCONEE 3 SPENI FUEL CASE TIP ACCIDENT (TAR NO. 6084)
O' PLANT NAME: Oconea 0
D DOCIET NUMBER: 50-23 CO i
RESPONSIBLE BRANCHi ORB-1
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PROJECT MANAGER:
G. Zech O
"D Au REQUESTED RECEIVED IN EEB: August 11, 1976 L]
REQUESTED COMPLETION DATE: August 13, 1976 C
REVIEW STATUS: EEB - Complete l
The consequences of a spent fuel cask cipping and f=114ng onto spent fuel assemblies in the spent fuel pool have been calculated for the Oconee 3 facility for both the safety evaluation and environmental impact appraisal.
With accident source terms decayed to 43 days, offsite dose consequences are within the exposure guidelines of 10 CFR Part 100 for both 5 percent and 50 percent meteorological conditions. Tables 1 and 2 provide the assu:sptions and results of the exposure calculations.
This review was conducted by M. Wohl, of the Environmental Evalua' tion Branch.
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- mat D. G. Eisenhut, Assistant Director for Operational Technology Division of Operating Reactors Office of Nuclear Reactor Regulation Enclosure
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m TABLE 1 CONSERVATIVE ASSUMPTIONS AND ESTIMATED CONSEQUENCES FOR SPENT FUEL CASK TIP AT OCONEE 3 Power level 2928 Mwt Operating time 3 years Power peaking factor 1.65 Decay times 43 days Fraction in gaps:
Kr-85 30%
All other noble gases 10%
Iodine 10%
Number of assemblies damaged 76 Number of assemblies in core 177 i
Iodine Decontamination Factor in pool water 100 Initial inventories at time of shutdown:
I-131 25,080 ci/Mwt
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259.5 ci/Mwt Xe-131m Xe-133 56,220 ci/Mwt Kr-85 410.2 ci/Mwt 3.47 x 10-4 3/see m
Breathing Rate Dose, rem (43 days) 3 5% X/Q, sec/m Thyroid Whole Body EAB (1609 m) 2.2 x 10-4 150
<1 LPZ Boundary (9656 m) 4.0 x 10-5 27
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m TABLE 2 REALISTIC ASSUMPTIONS AND ESTIMATED CONSEQUENCES FOR SPENT ' FUEL CASK TIP AT OCONEE 3 Power level 2928 Mwt Operating time 3 years Power peaking factor 1.0 Decay times 43 days Fraction-in gaps:
Kr-85 20%
All other noble gases 2%
Iodine 2%
Number of assemblies damaged 76 Number of assemblies in core 177
-Iodine Decontamination Factors in pool water 500 Initial inventories at time of shutdown:
I-131 25,080 ci/Mwt Xe-131m 259.5 ci/Mwt Xe-133 56,220 ci/Mwt Kr-85 410.2 ci/Mut Breathing Rate 3.47 x 104 3
m /3,e Dose, rem (43 days) 50% X/Q, sec/m3 Thyroid Whole Body EAR (1690 m) 4.7 x 10 <1
<1 LPZ Boundary (9656 m) 2.5 x 10-6
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