ML18038B498

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Failure of Two Reactor Zone Isolation Dampers to Close
ML18038B498
Person / Time
Site: Browns Ferry Tennessee Valley Authority icon.png
Issue date: 11/02/1995
From: Machon R
TENNESSEE VALLEY AUTHORITY
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML18038B499 List:
References
NUDOCS 9511070053
Download: ML18038B498 (6)


Text

PRIOR>xx (ACCELERATED RZDS PROCESSING)

REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)

ACCESSION NBR:9511070053 DOC.DATE: 95/11/02 NOTARIZED: NO

'OCKET g

FACIL:50-260 Browns Ferry Nuclear Power Station, Unit 2, Tennessee 05000260 P

AUTH.NAME AUTHOR AFFILIATION

.MACHON,R.D.

Tennessee Valley Authority RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)

SUBJECT:

Forwards LER 95-008 re failure of two reactor zone isolation dampers to close.

DISTRIBUTION CODE IE22T COPIEQ RECEIVED:LTR ENCL SIZE-TITLE: 50.73/50.9 Licensee Event Report (LER), Incident.Rpt, etc.

NOTES RECIPIENT ID CODE/NAME PD2-3-PD COPIES RECIPIENT LTTR ENCL ID CODE/NAME 1

1 WILLIAMS,J.

COPIES LTTR ENCL 1

1 INTERNAL: ACRS AEOD/SPD/RRAB NRR/DE/ECGB NRR/DE/EMEB NRR/DRCH/HICB NRR/DRCH/HQMB NRR/DSSA/SPLB NRR/DSSA/SRXB RGN2 FILE 01 EXTERNAL: L ST LOBBY WARD NOAC MURPHY,G.A NRC PDR 1

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1 1

1 1

1 1

1 1

1 1

1 1

1 1

1 1

1 1

1' 1

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QEKTER NRR/DE/EELB NRR/DRCH/HHFB NRR/DRCH/HOLB NRR/DRPM/PECB NRR/DS SA/S PS B/B RES/DSIR/EIB LITCO BRYCE,J H NOAC POORE,W.

NUDOCS FULL TXT 2

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N NOTE TO ALL "RIDS" RECI PZENTS:

PLEASE HELP US TO REDUCE WASTE!

CONTACT THE DOCUMENT CONTROL DESKg ROOM OWFN 5D8 (415 2083)

TO ELZMZNATE YOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEED!

FULL TEXT CONVERSION REQUIRED TOTAL NUMBER OF COPIES REQUIRED:

LTTR 27 ENCL 27

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Tennessee Vatey Authority. Post Oleo Box 2000, Decatur. Atabarna 35609.2000 R. D. (Rick) Machon Vice President, Browns Ferry Nuctear Rant November 2, 1995 U.S. Nuclear Regulatory Commission ATTN:

Document Control Desk Washington, D.C., 20555

Dear Sir:

10 'CFR 50.73 BROWNS FERRY NUCLEAR PLANT (BFN) - UNZTS 1p 2p AND 3 DOCKET NOS ~

, 50-259~

50 260'ND 50-296 PACZLZTY OPERATXNG LXCENSES DPR-33'2'ND 68 - LZCENSEE EVENT REPORT 50-260/95008 The enclosed report provides details concerning the failure of two reactor zone isolation dampers to close.

The dampers failed to close because the solenoid valves were sticking.

Zn a preliminary investigation, the valve vendor observed a

black residue inside the disassembled solenoid valve.

However, TVA is still investigating the source of the residue.

Any additional corrective actions that are developed as a result of the investigation will be implemented in accordance with TVA's corrective action process.

This report is submitted in accordance with 10 CFR 50. 73 (a) (2) (v) and 10 CFR 50. 73 (a) (2) (vii)" as (1) an event or condition that alone could have prevented the fulfillment of a safety function of structures or systems that are needed'o control the release of radioactive material or mitigate,the consecpxences of an accident, and (2) an event where a single cause or condition caused two independent trains or channels to become inoperable in a single system designed to control the release of radioactive material or mitigate the consequences of an accident.

Sincerely, R.

D.

Ma n I Enclosure cc:

See page 2

'tt511070053 951102 PDR ADOCK 05000260 8

PDR

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U.S. Nuclear Regulatory Commission Page 2

November 2, 1995 Enclosure cc (Enclosure):

INPO Records Center 700 Galleria Parkway Atlanta, Georgia 30339 Paul Krippner American Nuclear Insurers Town Center, Suite 300S 29 South Main Street West Hartford, Connecticut 06107 NRC Resident Inspector Browns Ferry Nuclear Plant 10833 Shaw Road

Athens, Alabama 35611 Regional Administrator

'U.S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 Mr. J.

F. Williams, Project Manager U.S. Nuclear Regulatory Commission One White Flint, North 11555 Rockville Pike Rockville, Maryland 20852

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