ML20070R804
| ML20070R804 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 02/02/1983 |
| From: | Devincentis J PUBLIC SERVICE CO. OF NEW HAMPSHIRE, YANKEE ATOMIC ELECTRIC CO. |
| To: | Knighton G Office of Nuclear Reactor Regulation |
| References | |
| SBN-452, NUDOCS 8302040036 | |
| Download: ML20070R804 (3) | |
Text
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1671 Worcesser Rood Mah
- ch'**"* 01701 ta b5c Service of New Hampshire u
(617). 872 8100 February 2, 1983 SBN-452 T.F.B 7.1.2 United States Nuclear Regulatory Commission Washington, D. C. 205.5 Attention:
Mr. George W. Knighton, Chief Licensing Branch No. 3 Division of Licensing
Reference:
(a)
Construction Permits CPPR-135 and CPPR-136, Docket Nos. 50-443 and 50-444
Subject:
Open Item Response:
(SRP 9.5.4; Power Systems Branch)
Dear Sir:
In response to the opcn item regarding inadvertant operation of the Fire Protection System which was discussed with representatives of the Power Systems Branch at meetings conducted on January 10-12 and 25, 1983, we offer the following commitment.
The EDG Fuel Oil Storage Tnnk Rooms are equippad.rith redundant deluge l
sprays from the Fire Protection System. Opers: tic.7 (either intentional or l
inadvertant) of either spray would result in at le;st two alarms in the l
Control Room - one indicating auto-start of the fire pumps and another flow-initiated alarm identifying the location of the actuated deluge system.
Upon receipt of these alarms, Control Room personnel would immediately dispatch the on-site dedicated fire brigade to the scene.
Procedures for the i
fire brigade will instruct members of the brigades to enter the affected area and assess the extent of the fire or determine if the actuation was inadvertant.
If the actuation was not the result of an actual fire, the brigade will immediately isolate the deluge system using manually-operated valves located outside the affected area.
Through the use of a dedicated fire brigade and the procedures and training provided to brigade personnel, isolation of an inadvertant actuation of the deluge systems for the EDG Fuel Oil Storage Tank Rooms is expected to take no loager than 5-10 minutes from the time of actuation.
Because the EDG Fuel Oil Storage Tank Rooms contain the safety-related fuel oil transfer pumps, an analysis was performed to determine whether an inadvertant actuation of the fire system deluge spray would disable these pumps. The analysis assumed the maximum flow rate from both deluge sprays and neglected the mitigating effects of the room sump pumps. No credit for operator action was considered for the first 20 minutes of the incident.
1 B302040036 830202 PDR ADOCK 05000443 F
PDR 1000 Elm St., P.O. Box 330, Manchester, NH 03105. Telephone (603) 669-4000 TWX 7102207595
s' United States Nuclear Regulatory Commission February 2, 1983 Attention:
Mr. George W. Knighton, Chief Page 2 As a result of the analysis, two modifications to the EDG fuel oil transfer pumps will be made. First, a spray shield will be provided to protect the pump motor from spray impingement.
Secondly, the pump / motor units will be elevated to a point above the room floor such that continuous maximum flow from both fire protection deluge sprays will not result in flooding of the units for at least 20 minutes.
The abdva commitment will be included in OL Application Amendment 49.
Vary truly yours, VANKEE ATOMIC ELECTRIC COMPANY
' J. DeVincentis Project Manager AL/ces cc: Atomic Safety and Licensing Boatd Service List t
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JI ASLB SERVICE LIST Philip Ahrens, Esquire Assistant Attorney General Department of the Attorney General Augus ta, ME 04333 Representative Beverly Hollingworth Coastal Chamber of Commercc 209 Winnacunnet Road Hampton, NH 03842 U111iam S. Jordan, III, Esquire Ibrmon & Weiss 1725 I Street, N.W.
Suite 506 Washington, DC 20006 E. Tupper Kinder, Esquire g
t Assistant Attorney General Office of the Attorney General 208 State House Annex Concord, NH 03301 Robert A. Backus, Esquire 116 Lowell Street P.O. Box 516 Manchester, NH 03105 Edward J. McDermott, Esquire Sanders and McDermott Professional Association 408 Lafayette Road Hampton, NH 03842 Jo Ann Shotwell, Esquire Assistant Attorney General Environmental Protection Bureau Department of the Attorney General One Ashburton Place, 19th Floor Bos ton, MA 02108