ML20213E280
| ML20213E280 | |
| Person / Time | |
|---|---|
| Site: | Columbia  |
| Issue date: | 10/27/1982 |
| From: | Speis T Office of Nuclear Reactor Regulation |
| To: | Novak T Office of Nuclear Reactor Regulation |
| References | |
| CON-WNP-0552, CON-WNP-552 NUDOCS 8211050075 | |
| Download: ML20213E280 (3) | |
Text
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). i\\ U le CCT 2 71982 NE!!0RA!!DUit FOR:
T. i'ovak, Assistant Director for Licensing, DL FRO ll:
T. Speis Assistant Director for Reactor Safety, DSI SU3 JECT:
CS3 IflPUT TO llilP-2 SUPPLEMEilT TO Ti!E:SER Plant flane:
W!!P-2 Docket ll0.:
50-197 Responsible Branch: LB#1, DL Project ilanager:
R. Auluck Revieu Cranch:
CS3/DSI SRP G.2.2 provides that solid debris from unqualified paints that can potentially reach the emergency sump under design basis pipe break accident conditions should be considered in evaluatinq the containment heat removal systen.
Enclosed is the CS3 input to the ll;!P-2 SER supplement to address this issue. We find the applicant's analysis to be acceptable.
Orbena! S!ned By Themis P. Spels Themis P. Spels, Assistant Director for Reactor Safety Division of Systems Integration
Enclosure:
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f Input to Suppleuest-t'o the Safety Evalcation Report Washington Public Power Supply System, Nuclear Project No. 2 6.2.2 Containment Heat Removal System In our S BR input we indicated that the potential for debris breaking away from piping insulation, to clog the RHR suction s
Lines was evaluated and found acceptable.
Since thene the applicant has informed'us that there is aoproximately 5000 square
-s feet of unqualified organic coating on miscellaneous equipment and components in the drfweLL.
In accordance with the provisions of SRP 6.2.2, the applicant has completed its assessment of the design provision of preventing debris from entering the RHR system which could impair the performance of the system and concludes that:. (1) the total amount of paint involved is small; (2) it i's unlikely that all t'ne paint will fait simultaneously; (3) it is unlikely that a significant portion of pai.nt flakes would be transported to the
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s suppression pool because'of the tortuous path the flakes would have to follow; (4) the suction strainers are located at an intermediate elevation, i.e.,
neither at the bottom nor near the pool water surfacer so that sinking or. floating particles would not clog them; low approach velc'dities would minimize suspended particle migration toward the strainers; and (5) the emergency core cooling system analyses were performed assuming 50% ctcgging of the strainers.
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Based on its review, the staff concludes that the applicant has
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adequately addressed the debris issue and that the RHR system can be operated in such a manner as to provide adequate cooling to the containment following onset of a LOCA.
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