ML19261E993
| ML19261E993 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 03/02/1973 |
| From: | Grimes B US ATOMIC ENERGY COMMISSION (AEC) |
| To: | Schwencer A US ATOMIC ENERGY COMMISSION (AEC) |
| References | |
| NUDOCS 7910171047 | |
| Download: ML19261E993 (2) | |
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MM 2 1973
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A.Schwencer, Chief.,PWRBranch#4,)L [M, (W g/_[
N. R. W, gld r
d' RADIOLOGICAL CONSEQUENCES OF A FUEL CASE DROP FOR THREE MILE ISLMD PLANT NAME: Three Mile Island, Unit 1 i
LICENSING STAGE: OL DOCKET NUMBER: 50-289 RESPONSIBLE BRANCH: PWR #4 REQUESTED COMPLETION DATE: March 19, 1973 l
APPLICANTS RESPON3E DATE NECESSART POR NEXT ACTION PLANNED ON PROJECT:
N/A DESCRIPTION OF RESPONSE:
N/A REVIEW STAIUS.: Complete
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We have calculated the radiological consequences of a fuel cask drop at the TMI-1 plant as requested in your memo to me dated February 16, 1973. The resulting doses are 11 rem thyroid and about 2 rem beta dose to the skin of the whole body. Since these doses are a setall fraction of the dose. guidelines of Part 100 we do n:t consider any modifications to the TMI-1 fs:ility to be necessary.
l The plant technical specifications should require a =fn4= m holdup time (similar to the 120 days used in the computation) before handling of a fuel cask containing spent fuel ele:nents is allowed at the indicated heights.
-:ua by Yb f
Brian Grimes, Chief Accident Analysis Branch Directorate of Licensing I
i Enclosures (As Stated)
DISTRIBUTION L - Rdg.
t AAB - Rdg.
AD/SS - Rdg.
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Sub ect File 1486 042 l
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I Poem AEC-518 (Itev. 9-53) AECM 0240 e u s. GOVEmewtNT Manw.
<E 1972-466-983 7910171 g
J Ci/MWt at 120 DAYS Ci/Mwe
-10.33 I-131 25,080 e 0.818
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-15.7 Xe-133 56,220 e 0.00862
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0 Kr-85 410.2 e 410.2
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-6.93 Xe-131m 260 e 0.247
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TOTAL CORE INVENTORY FOR TMI-1 AT 120 DAYS Curies in 10 Fuel Assenblies I-131 2535 x 0.818 = 2074 117
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Xe-133 2535 X 0.00862 = 22 1.24
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6 2535 x 410.2 = 1.04 x 10 5.9 x 10' Kr-85
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Xe-131m = 2535 X 0.247 = 626 35 RELEASES, ASSUMING 10% NE- (30% Kr-85) and 10% IODINES E
CE I-131 11.7 curies' O.581 net Xe-133 0.124 curies 0.19 neg.
Kr-85 1.8 x 10' curies 0.25 4.5 x 10 Xe-131m 3.5 curies 0.164 neg.
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-3 Thyroid dose = (11.7) (1.48)(3.47) (1.2) = 7.2 Rem 1/
Whole Body,= 0.25 ice X/Q
$ (0.25) (1 8) (0. 35) (1 2) = 1.35 Rem 1!
l_/ Assuming a peaking factor of 1.5 for the fuel elements involved, the resulting doses would be 11 rem thyroid and 2 re= whole body skin dose.
1486 043-
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