ML19322C496
| ML19322C496 | |
| Person / Time | |
|---|---|
| Site: | 05000273, Crane |
| Issue date: | 06/26/1979 |
| From: | Faulkner H NRC OFFICE OF INTERNATIONAL PROGRAMS (OIP) |
| To: | Weehuizen F SWITZERLAND |
| References | |
| TASK-TF, TASK-TMR NUDOCS 8001170824 | |
| Download: ML19322C496 (2) | |
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i{UC[EARREGULATORYCOMMISSION PRIORITY CLAS IFIED a c=
OCFICE OF INTERNATIONAL PROGRAMS WASHINGTON, DC 20555 TELEX NO:
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5'4ER,RSEARC GREEMENTS' COORDINATOR 492-7788 0 a=i-ss THl3 $*AdLNCR USE OF COMMUNICATION UNIT MLS5 AGE TO st 1RANSMITito IU e Josble gaieg and all sopius lonen)
TO2 MR. F. WEEHUIZEN NUCLEAR SAFETY DIVISION EIDG. AMT FUR ENERGIEWIRTSCHAFT i
5303 WUERENLINGEN, SWITZERLAND TELEX:
59058 8
THANK YOU FOR YOUR EARLIER TELEGRAM 0F JUNE 15,1979.
i IN ADDITION TO SHARING INFORMATION RELATING T0 1974 INCIDENT WITH l' t
u WESTINGHOUSE AND NRC LICENSEES AND CONTRACTORS, WE BELIEVE IT WOULO BE i BENEFICIAL TO SHARE THIS INFORMATION WITH THE NUCLEAR SAFETY ANALYSIS j
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CENTER.
THE CENTER IS OPERATED BY THE ELECTRIC POWER RESEARCH i
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INSTITUTE (EPRI) FOR THE U.S. ELECTRIC UTILITY INDUSTRY. WE REQUEST i:
YOUR PERMISSION TO SHARE THE INFORMATION WITH THIS ORGANIZATION. !:
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A SLIGHT REVISION TO THE TEXT PROPOSED IN YOUR TELEGRAM 0F JUNE 15 i
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f FOLLOWS. WE HOPE THIS IS SATISFACTORY TO YOU.
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QUOTE. WE ARE AWARE OF ONE EVENT AT A FOREIGN REACTOR DESIGNED BY j
i f"3 WESTINGHOUSE, WHICH OCCURRED A NUMBER OF YEARS AG0 IN WHICH A PORV WAS !
CHALLENGED DURING A TURBINE TRIP TRANSIENT AND FAILED TO RECLOSE WHEN j
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PRESSURE DECREASED..THE FAILURE.T0 CLOSE.:
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_BY THE OPERATORS, WHO IMMEDIATELY ISOLATED THE VALVE BY CLOSI L y,,,,,,c,;,
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~o. o,,cs. 1 2 UNCLASSIFIED e i ITAND/.tD possa to U.S. 00VEFM.ENT PRINTING OFFICIs 197'-535-402 30 _ gg01170p)y gg y l f fVlil? AUGUST 1947 ca,~a ni Cm f oi-naos $ $ M N SINI$ N $ $ N $ [N N$f $ $ $ $ I h hh[ M N [j $ h i${[ f
h ' ' ' '" ~ ~ Ils,' lhn k..t (_') .: y tp j - ,y' O y gcr grs ;4W ucutirY CLASSNsCAfoN . >b-mcIDtNd PRIORITY ,cy,0, UNCLASSIFIED uc, TYPE OF k!SSAGE DATE Pff7Aaf 0 Mr4G CLAi$3HCATON 6/26/79 roe inroita4 Tion c4tt O= ~,~u u. w 0 ""'* "5' 492-7788 HJF , IIS SPACE FOR USE Of COMMUNICATION UNIT MESSAGE TO BE T8 W5MITTED (Use 44.He @,d.g../ ell capiret lenm) { i TO: MR. F. WEEHUIZEN (CONTINUED) THE BLOCK VALVE IN SERIES WITH THE PORV. THIS ACTION TERMINATED THE I INCIDENT. THE FAILURE TO RECLOSE WAS DUE TO THE RUPTURE OF,.THE CAST-i i IRON FPME BETWEEN THE VALVE OPERATER AND THE VALVE BODY WHICH WAS - THESOURCEOFTHEWATERSLUdl CAUSED BY A WATER SLUG HITTING THE VALVE. WASTHELOOPSEALLOCATEDBETWEENTHEPRESSURIZE I i, i i INVESTIGATION OF THIS EVENT IDENTIFIED THE CAUSE OF THE VALVE FAILURE l } TO BE DESIGN ERROR WHICH)WE UNDERSTAND HAS BEEN SUBSEQUE O ,U r) v. UNQUOTE. i [ H. J. FAULKNER, NRC. i L i i END i i ] i _ 7 --t ,s, BJg ucumv cassmCArea M . c. Pos. 2 2 UNCLASSIFIED Q c l'! S U.S. COVERN%ENT PRINTING OFFICE: 3974-535-402 N. e emstr; August i967 c5A r~ gi cm ici-23.2o. 'N x., .}}