ML19329C216
| ML19329C216 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 05/10/1976 |
| From: | Tedesco R Office of Nuclear Reactor Regulation |
| To: | Deyoung R Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8002120937 | |
| Download: ML19329C216 (3) | |
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Docket File
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Docket "o 50-346 R. C. DeYoung, Assistant Director for Light Uater Reactors, DPM SUPPLEFJ2rr UO.1 TO SAFETY L7ALUATIC3 REPORT Plant Na:ne: Davis-3csse nuclear Power Station, Unit 1 Licensing Stage; OL Ooeket Nu:sber: 50-346 Responsthie 3 ranch: UR-1 Project Leader:
L. 3. Enale 2equested Completion Date: May 7,1976 (Scheduled date July 2,1976)
The enclosed Sucplement Mo.1 to tha Cafety Evaluation Report, dated February 26, 1975 covers our review of the Davis-3 esse Unit i nuclear plant up to and including Amendment 34 in the areas of Auniliary and Power Conversion Systees 3 ranch responsibility.
(1) 9.1.3, S,ent Fuel Pool Cooline and Clennun Systen The SER stated that the entire spent fuel pool cooling system was a seisnic Category I systen. However, only the pipine within and penetrating the apcat fuel pool valls up to and including the first isolation valvo is desiened to scianic Category I requirements. The remainder of the SimCCS is non-seistd.c Category I.
The spent fuel cooling systen as designed teets the single active failure criterien.
L'e conclude the SFPCCS is acceptable.
(2) 9.2.2, Coenonent Cooline Unter ? rsten In Acende:ent 32, the applicant has agreed to provide a seistic Category I backun water supply to the CCU3 fren the forvice k'at,*.r System. This-issue is now considered resolved.
(3) 9.2.5, Ultinate Heat Sink On Saptember 19, 1975 the rydroley Engineering group of site safety nrovided a " Revised rydrolo ie Engineering Stuary' thich deter.ined that the ultir ate heat sinh for Unit I was adequate to perforn its safety function under accident and LOCA condiel'gr. This issue is now considered resolved.
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R. c. neYoung MAY 1 0 1976 (4) 9.2.7, Auxiliary Feedwater Systems The applicant has provided additional information in Amendments 32 and 33 that aasures all motor operated valves in the AP.i systen are accessibla for manual operation under accident or emergency conditione.
This is accomplished by special access platforms and ladders, physical system separation or compartrentation where necessary. This issue is now considered rseolved.
(Approval of the A2V system is contingent upon resolution of open issue contained in Section 7.4.1 of EICF3 SER relative to control of containnent idolation valves in the AFU lines.]
(5) 9.4.2.2, Fuel !'andling Arca In Anendcont 33, the applicant has agreed with our request to provido a revised e=ergency exhaust ventflation systen that will autocatically pick up the lead from the spent fuel handling area in the event of a fuel handline accident. Tha systen vill be in ocaration prior to pl. tnt operation.
This issua is now conaidered resolved.
(6) "cetion 9.5.1, 71ro Protect. m Systen Tha follerine paragraph should be added to the end of Section 9.5.1 of the SZR.
As a result of investigations and evaluations presently being conductad by the ',T.0 staff on fi s protoction systers, further requirenenta nay be ixosed en the Davia-2csse Unit 1 desien to further 1:nrove the capabilley of the fire protection systen to prevent unacceptable onmaco that may result fron a fire.
(7) 9.5.
. Olesel ?ncine Fuel Oil Storaco and Transfer Sy9 ten l
In Amendments 32 and 33, the applicant has agreed with our request to provido a seismic Catecary I, tornado and tornado missile protectad diesel generator fuel oil storsgo systen scheduled for operation in June 1977. The applicant requested approval to cor.nence oper:ition of the plant now scheduled for the and of 1976, with the existine fuel oil storane system. The probability of an accident occurring during this short period of tina requiring the seismic Category I fuel oil storage systen is remote.
Cu this basis we recencended in a letter to "r.
U. R. Butler dated " arch 18, 1976 that permission be tranted to Toledo-Edison to use the present fuel oil storate systen until June 1977. This issue is new censidered resolved.
1 R. C. DeYoung Mg i 01976 i
Uith the information provided in Amendments 27 to 34, we have now resolved all outstanding items on Davis P, esse Unit 1.
OMW.a! sistned by:
P.obert L. Tedesco Robert L. Tedesco, Assistant Director for Plant Syste::s Division of Systems Safety 2nclosure:
As Stated cct S. I!anauer, TA
'J. Mcdonald, MIPC R. "cyd, PM P.. IIcineman, DSS J. Stolz, D a-1
- 7. 3enaroya, APCSD L. Engle, L'JR-1 D. Fischer, AFCSS
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- 3. Var.ga, DM J. Glynn, ?S A, UnSaro, APCSE o,,,e s,
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