ML20236X653
| ML20236X653 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 12/04/1987 |
| From: | Travers W Office of Nuclear Reactor Regulation |
| To: | Standerfer F GENERAL PUBLIC UTILITIES CORP. |
| References | |
| CON-NRC-TMI-87-084, CON-NRC-TMI-87-84 NUDOCS 8712090366 | |
| Download: ML20236X653 (2) | |
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DN 50 320 HRC PDR Local PDR TMI HQ r/f TMI Site r/f December 4,1987 BBoger NRC/TMI 87-084 EJordan JPartlow FSchroeder WTravers Docket Mo. 50-320 MMasnik JThomas TMoslak Mr. F. R. Standerfer Vice President / Director, THI-2 GPU Huclear Corporation P. O. Box 480 lliddletown, PA 17057 Deer fir. Standerfer:
Subject:
Defueling Canister Technical Evaluation Rcport (H65403, M66341)
References:
(a) Letter 4410-87-L-0052, F. Standerfor to USNRC, Annual Update of the Defueling Canister Technical Evaluation Report, dated May 7, 1987 (M65403)
(b) Letter NRC/TliI e5-083, W. Travers to F. Standerfer, y
Defueling Cenister Technical Evaluation Report, dated November 5, 1985 (c) Letter 4410-87-L-0116, F. Standerfer to USNRC, Defueling Canister Technical Evaluation Report - Revision 4, dated September 22, 1987 (M66341)
Reference (a) forwarded for hRC staff review your annual update to the i
defueling canister Technical Evaluation Report.
The revisions incorporated in the update include the use of exdified knockout canisters as dewatering filters in the canister desatering system, discussion of the effects of using the defueling water cleanup systen deep suction on canister loading, and evaluation of the effects of filter aid material and diatomaceous earth on cenister safety. The details of these revisions have been evaluated individually and found to be acceptable as discussed in previous correspondence.
Additionally, you revised the discussion of the design and performance of catalytic recombiners installed in the canister to reflect a faster canister pressurization rate due to a smaller required void volune after canister 1
dewatering. The consequences of a higher ? pressurization rate as shwn in ycur i
submittal are still within the bounds of t1e consequences shown in the staff's i
saare conservative analysis in raference (b), and are therefore still
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considered to be ecceptable.
Reference (c) subnitted additionel revisiens to the Technical Evaluation l
Report that reflect an increase in the pore size of the filter media in suae 8712090366 871204 c,me >
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of the filter canisters. Tha staff cc: curs with your conclusion that the chcage in ' filter pore siac has no deleterious effects on an;. aspects of canister safety.
In additun, reference (c) provided udditional analysis to suppart your request fur increasing the alluw.sble load drop into a ivel canister. ;!c hhve reviewed the results of your lc;d drop testing cnd concur that cllowing a single drap equivalent to 850 pounds, as naasured in c.ir, through the tull 1cagth uf fuel canister in water will not cause suf ficicat ddorn.ition of the cenister internals to inpare cenis ter parfcnance.
We have concludua that thc revisions subaitud by references (a) and (c) ar,.
ccceptable and therefar upproyu the Ddueling Cunistcr Technical Evaluation Report, Revision 4.
Si:.ceraly, DRIUNAL SIGNED BY, William D. Travers Uillian D. Travers, Director THI Cleanup Project directorate cc:
T. F. Da nitt R. E. Rug.n W. E. Putts S. Levin J. J. Sjrne
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