ML17326A599
| ML17326A599 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 03/24/1980 |
| From: | Dolan J INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| AEP:NRC:00213D, AEP:NRC:213D, NUDOCS 8004010420 | |
| Download: ML17326A599 (6) | |
Text
REGULATORY ORMATION DISTRIBUTION SY M (RIDS)
ACCESSI 8000010020 DOC ~ DATE: 80/03/24 NOTARIZED:
NO DOCKET FACI:5 -3
'nald C.
Cook Nuclear Power Planti Unit" 1g Indiana, 8
05000315 16 Donald CD Cook Nuclear Power PlantP Unit 2i Indiana 8
05000316 AUTH,NAME, AUTHOR AFF'ILIATION DOLANgJ ~ ED Indiana L Michigan Electric Co.
RECIP ~ NAME RECIPIENT AFFILIATION DENTONiH ORB Office of Nuclear Reactor Regulation
SUBJECT:
Requests permission to, use divers to cut studs for replacement of ra'cks in spent fuel pool, Dose calculations computed under two separate conditionsMax observed dose would be 0.7 man rems
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INTERNAL:
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1 19 PLANT SYSBR'0 EEB 1
1 21 EFLT'RT SYS EPB DOR 1
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INDIANA II MICHIGAN ELECTRIC COMPANY P. 0.
BOX 18 BOWLING GREEN STATION NEW YORK, N. Y. 10004 March 24, 1980 AEP: NRC: 00213D Donald C.
Cook Nuclear Plant Unit Nos.
1 and 2
Docket Nos.
50-315 and 50-316 License Nos.
DPR-58 and DPR-74 SPENT FUEL STORAGE CAPACITY EXPANSION PROGRAM Mr. Harold R. Denton, Director Division of Operating Reactors U. S. Nuclear Regulatory Commission Washington, D.
C.
20555
Dear Mr. Denton:
In our submittal No. AEP:NRC:00213B dated September 26,
- 1979, we informed you that the replacement of racks in the spent fuel pool (SFP) of the Donald C.
Cook Nuclear Plant could be accomplished without the use of divers.
- However, due to the initially unforeseen interface with six anchor bolts welded to the bottom liner and its supports, we see ourselves forced both in the interest of time and for the benefit of the workers involved, to request. permission to employ divers to cut the aforementioned studs.
We have performed a calculation of the expected doses that workers cutting the studs woul.d be receiving under two conditions.
The first one assumes that the studs are cut from the SFP handling crane.
Each stud will need between 8 and 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> to be cut.
The second condition assumes that the diver will take approximately 20 minutes to cut each stud.
Dose calculations based on actual measure-ments place the total absorbed dose at approximately 0.7 man-rem for the first method and at.2 man-rem using the diver, 3.5.
times less.
Consequently, the use of the diver represents a minor change in our earlier statements concerning the environmental and radiological impact of the change of spent fuel racks at the Donald C.
Cook Plant, and indeed will reduce the dose received by workers involved in the task.
An expeditious granting of your permission to proceed with the use of a diver is respectfully requested.
JED/emc cc:
Attached VeI"y truly yours, John E. Dolan Vice President Pooi 5
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Mr. H.
R.
Denton March 24, 1980 AEP: NRC: 00213D cc:
R.
C. Callen G. Charnoff R.
W. Jurgensen R.
S. Hunter D. V. Shaller - Bridgman
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