ML20033B609
| ML20033B609 | |
| Person / Time | |
|---|---|
| Site: | Shoreham File:Long Island Lighting Company icon.png |
| Issue date: | 11/16/1981 |
| From: | Milligan M LONG ISLAND LIGHTING CO. |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, SNRC-549, NUDOCS 8112010568 | |
| Download: ML20033B609 (2) | |
Text
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C Dfi 2/- U.c 1 LONG ISLAND LIGHTING COMPANY gg awawamw SHOREHAM NUCLEAR POWER STATION P.O. BOX 618, NORTH COUNTRY ROAD e WADING RIVER, N.Y.11792 November 16, 1981 S
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Mr. Boyce H.
Grier dl 3
Office of Inspection and Enforcement 2
NOV3 01981* g Region I R
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U.S.
Nuclear Regulatory Commission mucN 631 Park Avenue 6T/g 8
King of Prussia, PA 19406 N
CD LONG ISLAND LIGHTING COMPANY Shoreham Nuclear Power Station - Unit 1 Docket No. 50-322
Dear Mr. Grier:
On September 14, 1981 in accordance with 10CFR50. 55 (e), we reported verbally to Region I a potentially reportable deficiency concerning the impact a failure of our liquid CO2 storage tank and/or its associated piping might have on the operability of our Emergency Diesel Generators.
Since, no additional information was available concerning this subject on the "due date" of our 30-day letter, we requested extensions of the filing date in telecons with Mr.
L.
Narrow on October 13th and Mr. H.
Kister on November 5th, 1981.
This letter serves as our 30-day written report of this deficiency.
Description of Potential Deficiency An analysis has been performed by our Architect Engineer, Stone &
Webster Engineering Corp. to determine the potential hazard to the operability of the emergency diesel generators posed by the relative location of the CO2 storage tank and the diesel air intakes.
The diesel generators for the Shoreham Station are located in adjacent rooms in the Control Building.
The air intakes for the diesels are lined up on the west wall of the Control Building.
The CO2 tank for the fire protection system is located in the yard, west of the Control Building, about 40 feet north of the nearest diesel air intake.
Seismic design requirements are not specified for fire protection systems, except for piping supports in the areas of safety related structures, systems, and components.
Since the CO2 tank is not seismically designed, possible system interaction with the diesel generators has been considered.
0112010568 811116 h
PDR ADOCK 05000322 gj S
PDR I
pp i
s SNRC-549 November 16, 1981 Page Two An analysis was performed to' determine the. likelihood that the diesel generators could be adversely affected by CO2 due to tank l
damage..The analysis concludes that the diesels would -not lua affected.
A summary of the analysis is presented below.
The CO2 tank supports are not seismically designed. -Analysis shows that for the Design Basis Earthquake (DBE), the internal tank supports could fail.
In that event, the tank will drop about one foot to the pad.below.
For this condition, it has been determined that the tank itself remains unaffected.
It could be assumed that piping connected to the tank would rupture; however, it has been determined that the piping would deform, and at worst develop minor leaks releasing insignificant amounts of CO2 Even if it were to :be assumed that the line were to rupture, specific and unlikely unfavorable meteorology would have to exist for one diesel-generator (or, far less likely, two diesel generators) to be affected.
Even in this event, at least one, and probably two, diesels would operate as expected.
If a diesel were affected, which is not predicted, the effect would be limited to a slight delay in starting, with no long term impact on diesel performance or plant response.
Conclusion /CorrcCtive Action l
Since the analysis indicates that the CO tank will have no adverse 2
j effect on safety of operation,-no corrective action is required and we have concluded that this situation is not reportable under 10CFR50.55(e).
No further reports will be forthcoming on this issue.
Very truly yours,
%-Q M.
H.
Milligan Project Engineer Shoreham Nuclear Power Station Id [Ek $ )
Victor Stello, Director gr.;j0ffice of Inspection and Enforcement cc:
KRp Divisi'on of Reactor Operations Inspection Washington, D.C.
20555 M. J.
Higgins Site NRC Trailer i
L