ML20086C397
| ML20086C397 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 07/23/1975 |
| From: | Mittl R Public Service Enterprise Group |
| To: | Anthony Giambusso Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20086C404 | List: |
| References | |
| NUDOCS 8311230246 | |
| Download: ML20086C397 (3) | |
Text
F
,. O PSM, cJ
~
Public Service Electric and Gas Company 80 Park Place Newark, N.J. 07101 Phone 201/622-7000
,.,(T?
July 23, 1975
/h nr.tal., V r ),)
i JUL301975 -
Mr. A. Giambusso
- ~^
N
{
u.msm p/
Director, Division of Reactor Licensing c:7-mu V
yg'l, g '//
U. S. Nucicar Regulatory Commission Washington, D. C.
20555 g
Dear Mr. Giambusso:
AUXILIARY BUILDING FLOOD PROTECTION NO. 1 AND 2 UNITS SALDi NUCLEAR GENERATING STATION DOCKET NOS. 50-272 AND 50-311 Our letter of December 19, 1974 to the Director of Regulatory Operations reported the failure of No.1 Unit 4 kV vital switchgear due to flooding from a severe northeast storm on December 1, 1974.
t A telephone request for additional information was made by Mr. A. W. Dromerick of your staff. The attached response to Mr. Dromerick's request is hereby transmitted for your review.
Very truly yours, b'I 5l l
R. L. Mittl f
General Manager - Projects Engineering and Construction Department g M +- 3//
$2MCA'oPEo!$$
[
S
)
i 810u o
The Energy Peopic qp0FT BENT REGION
@ 250u,a74
14
=
3 e0 0
.j 1
z i
j RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION AUXILIARY BUILDING FLOODING l
NO.1 AND 2 UNITS l
SALD1 NUCLEAR GENERATING STATION i,
i QUESTION 1 If so, please Are there any water lines in the electrical switchgear rooms?
i provide drawings.
ANSWER A 12-inch Class I (Seismic) demineralized water line passes through the switchgear This line is a non-essential backup water supply to the room at elevation 64'. Auxiliary Feedwater System an
- will remain dry during normal plan by precluding any. potential for accidental water intrusion into vital electrical plant areas.
)
QUESTION 2
~
i Would a crack in a moderate energy, Class I (Seismic) pipe anywhere in the Auxiliary i
Building prevent the safe shutdown of the unit?
1 i
ANSWER
~
We have investigated the eff ects of a " critical crack." in the moderate energy, Class I (seismic) piping in the Auxiliary Building.
i t
The investigation indicated that a " critical crack" (taken to be 1/2 the pipe diameter I
in length and 1/2 the wall thickness in width) in any of these lines would not inter-f ere with the safe shutdown of the unit.
Equipment arrangement and floor drainage systems are adequate to prevent flooding l
In serious enough to impair the operation of equipment necessary for shutdown.the discharged the event of any Class I ( Seismic) line failure of " critical crack" size, effluent would be carried away via existin; floor drains or via stairwells and pipe chases to the RllR sump.
~
RllR sump level alarms vould alert the operator to take the necessary action required To. minimize discharged effluent.from yard to maintain the plant in a safe condition.
tanks into the Auxiliary Building, given a " critical crack" in a Class I (Seismic)_
pipe, steps could be taken in the yard area to reduce tank inventories or divert the inventory to other storage facilities.
e L
y
_.s.
.O O
QUESTION 3 Will all floor penetrations be sealed?
ANSWER It is planned to seal the floor penetrations between elevations 100' and 8k', and 84' and 64' in the switchgear rooms.
QUESTION 4 What type fire protection is provided in the switchgear rooms? Is it water deluge?
i ANSWER CO fire Protection is provided in the switchgear rooms.
2 0
6 e
l l
.g'
,