ML20051H289
| ML20051H289 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 05/11/1982 |
| From: | Devincentis J PUBLIC SERVICE CO. OF NEW HAMPSHIRE, YANKEE ATOMIC ELECTRIC CO. |
| To: | Miraglia F Office of Nuclear Reactor Regulation |
| References | |
| SBN-273, NUDOCS 8205170179 | |
| Download: ML20051H289 (4) | |
Text
.
smOM STATION IPUBLIC SERVICE Engineering Office:
Company of New Hamph 1671 Worcester Road Framingham, Massachusetts 01701 (617) - 872 - 8100 May 11, 1982 91 SBN-273 4
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\\g umE$&%?,l* 3 United States Nuclear Regulatory Commission 4
Washington, D. C. 20555 N
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Attention:
Mr. Frank J. Miraglia, Chief Licensing Branch #3 Division of Licensing
References:
(a) Construction Permits CPPR-135 and CPPR-136, Docket Nos. 50-443 and 50-4' 4 Su bjec t :
Meeting Notes; Fire Protection of Seabrook Station
Dear Sir:
We have attached notes resulting f rom the March 10, 1982 meeting with Chemical Engineering Branch (CE3) regarding fire protection.
These notes were previously submitted to CEB.
Very truly yours, YANKEE ATOMIC ELECTRIC COMPANY I
4.
JohnDeVincen$k
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tis Project Manager Attachment s.,
t 820517 O/77 C
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NOTES OF FIRE PROTECTION MEETING March 10,1982 NRC Of fice - Bethesda, Md.
, Genera l Guidance 1.
Call out specific deviations clearly.
2.
Short-tern ventilation loss OK, but long-term may be a problem.
3.
A marked up set (or three) would be useful to NRR (showing Train A and B safe shutdown circuits).
A.
Cable Spreading Room 1.
NRC asked for fire loading - we say we can lose the room and still shutdown so the information is irrelevant.
B.
Diesel Buf1 ding El 50 1.
Ventilation area - Ventilation for diesel generator rooms and one Train B cable (cooling water jacket for diesel generator).
No other saf e shutdown cables.
2.
We will remove Train B cable f rom area.
3.
NRC asked how long before diesel rooms would heat up if ventilation were lost.
4.
Uc statei there is no credible fire that could take out both ventilation trains.
5.
Identify area as a deviation and state rationale for acceptance.
State description of area, physical configuration, quantity, and orientation of cable trays.
6.
We will provide detection.
C.
PAB El 25 1.
Component Cooling Water (CCW) pumps (need 1 of 4) 2 per train.
2.
Train B cable will be placed in conduit.
3.
PAB will have fire detection.
4.
NRC asked for fire loading for area - cable trays should be sprinkled.
5.
NRC thinks vertical cable trays are a problem. He committed to review.
6.
Metal cover protection considered for 1st 5-8 ft. of vertical trays.
7.
NRC thinks suppression is required.
8.
Penetration through floor will have a fire barrier.
9.
8x10 glossles of area may be helpful.
10.
Look at barriers between trays and pumps.
PAB Fans (side by side) 3 Protect cabling to B Train fan.
2.
Evaluate heat shield to protect from an exposure fire.
D'.
Hochanical Penetration Area El (-8) 1.
COJ lines.
2.
Assume 5 gallon heptane fire and state valves can still operate at XO F.
3.
Write u;s why we can rtill operate and safely shutdown.
4.
Manual valve operations.
5.
No in situ fire loading.
6.
NRC wants detection in area.
7.
Address time to operate w/o manual actuation.
9 E.
Mechanical Penetration Area El (-26) 1.
Charging pump inlet.
2.
Provide justification why area needs no protection.
3.
NRC looking for detection.
F.
Cont a innent Enclosure Area - Two cooling units 1.
How long could you operate without fans.
2.
Detection is a must.
3.
Explain why 5 gallons of heptane will not destroy fans.
4.
Protect one train of conduit with barrier.
Containment Enclosure Area - Return Fans 1.
Evaluate loss of fans in deviation request.
2.
Will a fire that actuates fire damper but not shutdown fans cause the ducting to collapse.
I.
Conta i nment Pit Area - Nuclear Inst.
1.
A & B cables are in conduit.
2.
Can combustibles fall from above into the area ?
J.
Containment - Pressurizer 1.
State rationale for no additional protection.
2.
NRC Indicated no apparent problems.
K.
Emergency Feed Butiding 1.
If a fire in this area does not cause a loss of of f site power, NRC stated it should be OK.
2.
Discuss alternate feed pump scenario.
3.
NHC indicated suppression was not needed.
4.
Need Lpproved alternate system per III.L.
5 Need detection.
I 6.
Systems approach will be used to help justify area.
NRC Policy i
1.
If area has a lot of cables trays - follow SRP.
l 2.
If area <able is enclosed in conduit, no large in situ combustibles, deviations are likely to be granted on the basis of a good technical analysis.
o 3.
In containment, 5-10 ft. separation is acceptable (horizontal or ve rt ica l).
4.
Look a t spraydown of safety-related equipment due to sprinkler actuation.
5 Acceptable definition of transient combustible is 5 gal. of heptane.
6.
No transient combustible need be assumed in containment.
NRC Questions 1.
What is qualification for Barriers - Ref erence construction standards.
2.
What is qualification for penetrat!ons. Make in accordance with SRP.
3.
Detection System - What kind? Pyrotronics System III.
4.
Detector in control room ventilation intake? Ye s.
5.
What is detection system in control room? Local panel annunciation in cont rol room.
Go to local panel to determine exact location.
Doe s system meet 72D? NRC wants a block diagram of system.
6.
Water supply. What is greatest water demand + 500 gallons?
7.
Uould a single break eliminate both primary and secondary protections?
Could a single break wipe out all standpipes? Are standpipes still dry or permanently piped?
8.
Pumps - UL package installed per 207 Ye s.
9.
Ts pump annunciation to control room llM 207 10.
Any better piping drawings of fire protection system? Send to Staug.
11.
Valve supervision - will comply with Appendix A? What are provisions for supervision?
12.
Fire detection will be required in most areas containing safe shutdown equipment.
13.
Areas adjacent to control room should have 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> barrier and be sprinkled.
14.
Control room must have general area detectors.
2 P ping in safety-related areas.
15.
Need diagram it H i
16.
Would like a colored drawing showing all safe shutdown equipment locations.
_