ML20030C074

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Ro:On 810425,requirements for MSIV High Temp Isolation Were Not Met.Isolation Logic Channels Jumpered & Rendered Inoperable.Caused by Personnel Error.Jumper Removed. Investigation Ongoing
ML20030C074
Person / Time
Site: Browns Ferry Tennessee Valley Authority icon.png
Issue date: 04/27/1981
From: Abercrombie H
TENNESSEE VALLEY AUTHORITY
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
NUDOCS 8108250369
Download: ML20030C074 (2)


Text

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April 27, 1981 l

OFFICIAL COPY

.ERC RE@ 'i;,.l-p \\ l?'r i j

U. 5. Nuclear Regulatory Comission

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Reported under Technical Specification 6.7.2.s (5) cnl e

Date of Occurrence: 4/25/81 Time of occurrece: 1030 heura Unit 2 Technical specification Involved:

3.2.A

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Conditions Prior to Occurrence A

Unit 1 in reiveling outage: units 2 and 3 in normal operation.

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Id_entifica_ tion and treacrfotion of occurrgel T

The requirements of Table 3.2.A for main steam' isolation valve high-temperature isolation were not met. Both channals of foolation lo5 c i

were jtmpared and rendered inoperahla. The condition was recognized, and the jumpers removed within 48 minutes of being installed.

Apparent Cause of,0ccurrence Personnel ^ error in interpreting plant procedures concerning emergency use of temporary alterations.

Other Related Events None Co_rrective Action Taken or Planned The jtapers were removed within 48 minutes of being installed.

Investigation la presently underway to determine what personati actions and/or procedural changes are necessary to prevent rec _urrence.

hEGfOSAL DIRECTOR bEPUTY DIRECTOR ASSISTANT TO D. RECTOR p. t.. Aberc fe Power Plant Superintendent DIRECTOR, RRPl Browns Ferry Nuclear Plant DIRECTOR, EFOS DIRECTOR, ENF/iNV DIRECTOR, ETI PUBl.lC AFFA'.RS CFF,Ct1 1

8108250369 810427 L

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