ML20214K567

Advises That Reporting Period Began on 800401 for All PWR Licensees Committed to Providing NRC Prompt Notification of Porv/Sv Failures & Periodic Repts.Project Managers Should Have Info Available in Records

ML20214K567
Person / Time
Site:	Rancho Seco
Issue date:	04/19/1983
From:	Colburn T Office of Nuclear Reactor Regulation
To:	NRC
References
TASK-2.K.3.01, TASK-2.K.3.02, TASK-2.K.3.03, TASK-TM TAC-45273, TAC-45319, TAC-45376, NUDOCS 8705280500
Download: ML20214K567 (4)

Text

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MEMORANDUM FOR: All Operating PWR Project Managers A % \Cg FROM: Timothy G. Colburn, Lead Project Manager WD%  !

NUREG-0737 Item II.K.3.2 (MPA F-37)

Report on PORV Failures

SUBJECT:

OPERATIONAL DATA ON PORV/SV FAILURES AND CHALLENGES In response to NUREG-0737 Item II.K.3.3, all PWR licensees committed to providing the NRC prompt notification of PORV/SV failures and periodic reports on PORV/SV challenges (annual or monthly reports). This reporting period began April 1, 1980.

Prior to the TMI accident, little data existed accurately portraying the operational failure and challenge rates of PORVs and in some cases SVs.

In order to better assess the validity of the licensee's responses to MPA F-37 " Report on PORV Failures" (generic owners group reports), it is requested that each PM for PWRs complete the attached questionaire and forward them to T. G. Colburn, MS 428 by COB April 26, 1983. PMs should have this information available in their records for the most part but if not, please contact your licensee to provide the requested information.

This request for information is approved by OMB under clearance number 3150-0065 which expires May 31, 1983..

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Timothy G. Colburn, Lead Project Manager MPA F-37 " Report on PORV Failures"

Attachment:

As stated cc: G. Lainas F. Rowsome R. A. Clark A. Thadani E. Chow l

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!!!!T C~T L"Jf5rTIM DK PGl'//.3* FAILGtES- ANC CHALLENGE 5 i 11JrT EM 4cA e h =_ u . DOCKET ("u - 112 _

l Give the vender and model name of and how seny PORVs and SVs you i

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Do the p0RV's have an associated block valve?

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0 List the PORV and SV pressure setpoint.

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For each PORV and 5V. list how many failures and challengas have occurred l

frees April 1,1980 to March 31. 1983. List actions to correct any failures. I tist transients causing challenges and ownber of challenges per transtant. , {

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What percentage of this time period have the PORY's been blocked off7 1

Giva reasons for blocking off. i.e., leakage past PORV, paCaing Isak {

on block valve. etc. hmich PORVs are blocked off now, if anyt '

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Att Ohment QUESTI0t!S Ot; PORV/SV FAILURES Af;D CHALLEt!GES PLANT NAME #2 d  % c.- o DOCKET 60-1/2

1. Give the vendor and model name of and how many PORVs and SVs you have at your facilities.

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2. Do the PORV's have an associated block valve?

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3. List the PORV and SV pressure setpoint.

4. For each PORV and SV, list how many failures and challenges have occurred from April 1, 1980 to March 31, 1983. List actions to correct any failures.

List transients causing challenges and number of challenges per transient.

5. What percentage of this time period have the PORV's been blocked off?

Give reasons for blocking off, i.e., leakage past PORV, packing leak on block valve, etc. Which PORVs are blocked off now, if any?

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