ML20203L404
| ML20203L404 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 08/21/1986 |
| From: | Bailey J GEORGIA POWER CO. |
| To: | Youngblood B Office of Nuclear Reactor Regulation |
| References | |
| RTR-NUREG-0588, RTR-NUREG-588 GN-1049, NUDOCS 8608260168 | |
| Download: ML20203L404 (2) | |
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Georgia ibwer Company Post Offio] Box 282 Waynesborn Georgia 30830 Telephone 404 G54-9961 404 724 8114 Southern Company Services, Inc.
Post Office Box 2625 h
Birmingham. Alabama 35202 Telephone 205 8704011 VOgtie Project August 21, 1986 File:
X6BK15 Director of Nucicar Reactor Regulation Attention:
Mr. B. J. Youngblood Log:
GN-1049 PWR Project Directorate #4 Division of PWR Licensing A U. S. Nuclent Regulatory Commission Washington, D.C.
20535 REF: BAILEY TO DENTON, GN-963, DATED 6/25/86 NRC DOCKET NUMBERS 50-424 AND 50-425 CONSTRUCTION PERMIT NUMBERS CPPR-108 AND CPPR-109 V0GTLE ELECTRIC GENERATING PLANT - UNITS 1 AND 2 SER CONFIRMATORY ITEM 9: STEAMLINE BREAK OUTSIDE CONTAINMENT
Dear Mr. Denton:
The following information, as diccussed in a conference call with your staff on August 19, 1986, is provided to clarify the use of ASCO solenoid valves in the Main Steam Isolation Valve (MSIV) areas.
The VEGP design utilizes four models of ASCO solenoid valves in safety-related applications: NP8316, NP8320, NP832t, and 206-381.
One NP8316 is located in the MSIV traa.
It is associated with the containment isolation valve for the nitrogen sapply to the safety injection accumulators and is ne. required to function ft: a Main Steam Line Break (MSLB) in the MSIV area.
Eighteen process valves utilize NP8320 solenoid valves.
Six of the process valves (steam generator layup isolation valves (4) and electric steam boiler isolation valves (2)) are not essential for the MSLB in the MSIV area; the other 12 process valves (main steam bypass valves (8) and feedwater control The calculated bypass valves (4)) are essential for a MSLB in the MSIV area.
temperature conditions existing in the vicinity of the NP8320 solenoid valves do not exceed the qualification temperature of 420*F documented in ASCO Test Report No. AQR-67368 (Rev.1) and Westinghouse WCAP 8687 (Supp. 2 - H02A/H05A, Rev. 2).
8608260168 860821 4
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Director of Nuclear Reactor Regulation File: X7BC35 August 20, 1986 Log:
GN-1049 Page 2 Eight process valves utilize NP8321 solenoid valves.
Four of these process valves are located in the Auxiliary Building where the ambient temperature does not exceed the qualification temperature of 346*F.
For the four process valves in the Control Building, a thermal lag analysis using the methodology consistent with NUREG-0588, shows that the valve itself does not exceed its qualification temperature. In addition, these valves perform their essential function before the ambient temperature exceeds the qualification temperature of 346*F.
The 206-381 solenoids are not located in the MSIV area and perform no essential function for the MSLB in the MSIV area.
If your staff requires any additional information, please do not hesitate to contact me.
Sincerely, f
~
f. A. Bailey J
Project Licensing Manager JAB /sm xc:
R. E. Conway R. A. Thomas J. E. Joiner, Esquire B. W. Churchill, Esquire M. A. Miller (2)
B. Jones, Esquire G. Bockhold, Jr.
NRC Regional Administrator NRC Resident Inspector D. C. Teper W. C. Ramsey L. T. Gucwa Vogtle Project File 0674V