ML20213D822
| ML20213D822 | |
| Person / Time | |
|---|---|
| Site: | Columbia  |
| Issue date: | 09/23/1981 |
| From: | Butler W Office of Nuclear Reactor Regulation |
| To: | Bosnak R, Pawlicki S Office of Nuclear Reactor Regulation |
| References | |
| CON-WNP-0389, CON-WNP-389 NUDOCS 8110160049 | |
| Download: ML20213D822 (1) | |
Text
f.a
.D
- !/,hrQi!'h b, SEP 2 319sj03 GCI 2MW u.5 %lAs 4
MEl:0RANDUll FOR:
R. Bosnak, Chief, Mechanical Engineering Branch, DE S. Pav.licki, Chief, Materials Engineering Branch, DE FROM:
W. Butler, Chief, Containment Systems Branch, DSI
SUBJECT:
WriP-2 INTEGRITY OF SAFETY RELIEF VALVE DISCHARGE LINE (SRVDL) PENETRATION The safety relief system for WNP-2 consists. of eighteen safety relief valves connected to the main steam lines in the drywell. The discharge line from each SRV is routed through the baffle plate on selected downdomers to about six feet below the drywell floor. At this elevation the SRVOL exit the down-comers and are then routed to their respective quencher device in the pool.
The applicant indicated that they have perfomed an ASME Section III fatigue analysis per class 1 rules on the SRVDL/ vent pipe penetration. The applicant also indicated that no further ISI is going to be perfomed on these welds.
The Containment Systems Branch is concerned that following SRV actuation de-terioration of the SRVDL/ vent pipe penetration weld might occur, causing a potential suppression pool bypass path. Without ISI, this situation would go undetected for eighteen months; i.e., until a leakage test is perfomed pre-scribed by SRP G.2.1.1.c.
We, therefore, request the assistance of the Mechanical Engineering Branch and the Materials Engineering Branch to detemine whether or not the fatigue analy-sis perfomed by the applicant is sufficient to assure the leak tightness be-tween the drywell and wetwell air space regions over the forty year life of the plant.
If you have any questions concerning this matter, contact F. Eltawila (X29418)
Picase provide 'a response to the Containment Systems Branch no later than January 1982.
4
- ply L
Walter R. Rutler, Chief Containment Systems Cranch Division of Systems Integration cc:
L. Rubenstein J. Knight Central files H. Beammer CSB Rdg R. Li WButler R. Auluck 1 Kudrick F. Eltawila mna.
C SB,: DS I,,g,,, CSB,:DSI,gg,,
CS,8h
' suneJ>
.,.C n. tac.t.:.... ".....U.te,1.),iu, Q B.@l,,,,,., FE,1 t aw i 1,a,,; j,fdKudrick ButI r W
gla 9/;,2,/,81,,,,,,,, 9/,;,7,/,a,1,,,, ', 9fff,jal,,,,,,,,
L110160049 B10923 N'-ADOCK05000g7 OFFICIAL RECORD COPY u weo:i i-m