Summary of 860610 Meeting W/Util in Bethesda,Md Re Licensee Analyses on Performance of Structural Steel Supports for Cable Trays (Electrays) in Unit 1 Mechanical Pipe Chase & Unit 2 Auxiliary Feedwater Pump Room After Fire| ML20202D242 |
| Person / Time |
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| Site: |
Mcguire, McGuire  |
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| Issue date: |
07/02/1986 |
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| From: |
Madden P
NRC |
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| To: |
NRC |
|---|
| Shared Package |
|---|
| ML20202D216 |
List: |
|---|
| References |
|---|
| NUDOCS 8607140077 |
| Download: ML20202D242 (3) |
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Category:MEETING MINUTES & NOTES--CORRESPONDENCE
MONTHYEARML20196H1471999-06-24024 June 1999
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[Table view]
Category:MEETING SUMMARIES-INTERNAL (NON-TRANSCRIPT)
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1999-06-24
[Table view] |
Text
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- f4 UNITED STATES NUCLEAR REGULATORY COMMISSION
[' o,$ REGION 11
$ ,j 101 MARIETTA STREET N.W.
\...../ manu MEMORANDUM FOR: Files THRU: p A. R. Herdt, Chief, Engineering Branch, Division of Reactor Safety 1
T. E. Conlon, Chief, Plant System Section, (PSS) Division of :
g" Reactor Safety l FROM: P. M. Madden, Fire Protection Specialist, PSS, Division of Reactor Safety
SUBJECT:
MEETING WITH DUKE POWER AND NRR REGARDING PERFORMANCE OF ELECTRAY SUPPORTS UPON EXPOSURE TO FIRE - MCGUIRE NUCLEAR STATION DOCKET NOS. 50-369 AND 50-370 On June 10, 1986 a meeting was held at NRC headquarters between NRR, Duke Power I Company and NRC Region II to discuss the licensee's structural steel analyses I with regard to the performance of the unprotected steel supports supporting protected raceway in the Unit 1 mechanical pipe chase and the Unit 2 auxiliary feedwater pump room after being exposed to an exposure fire.
The licensee indicated that the cabling and motor operators associated with auxiliary feedwater (AFW) suction valves 2CA-161C and 2CA-162C were protected inside the Unit 2 motor drive AFW pump room with a one hour fire barrier and that the area was protected by an automatic wet pipe sprinkler system. The licensee indicated that these valves are required to open automatically to align to the Nuclear Service Water System thus, providing a long term source of water supply to the suction of the turbine driven AFW pump. The licensee presented their analysis, which based on the finJ combustibles in close proximity to the subject cables and valves, demonstrates that the structural steel supports supportino .*he raceway fire barrier would be functional after the fire. The licensee also indicated that the normal water source would be available for four hours. The licensee's position is that this is adequate time for the fire brigade to sup-press a fire in the Unit 2 AFW pump room and operators to ehter the room to manually realign the valves if necessary.
In addition, the licensee indicated that the unit 1 AFW suction valves ICA-161C and ICA -162C and associated cabling are protected by a three hour fire barrier in the Unit 1 pipe chase and mechanical penetration room. The licensee noted that this was a similar situation to the Unit 2 AFW pump room and that these valves were required to be opened within four hours to provided the long term source of water to the Unit 1 Turbine driven AFW pump. The licensee also noted that no fixed fire suppression is installed in the area. However, the area is protected by a fire detection system.
NbDON F
[
.. j 2 JUL 2 B86 NRR indicated that the licensee's position on this issue would be enhanced if the licensee would incorporate these manual valve actions into their shutdown proce-dure. The licensee noted that they would respond to NRR's request by letter.
< s/
. M. adden
Enclosure:
List of Participants cc w/ enc 1:
D. Hood, NRR/PWR-A S. West, NRR/PWR-A V. Brownlee b
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,-,-,---.-.---m. . _--- ._.. .-- ,
ENCLOSURE MCGUIRE NUCLEAR STATION STRUCTURAL STEEL FIRE PROOFING TECHNICAL MEETING JUNE 10, 1986 PARTICIPANTS: NRC DUKE POWER COMPANY
- S. West D. Brades F. Rinald J. Olden P. Madden G. Day j D. Hood
.l i
t l
1
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