05000260/LER-1980-045-01, /01T-0:on 801107,door Latch Mechanism Failed on Equipment Access Doors 237 & 238 Between Turbine Bldg & Reactor Bldg.Caused by Misaligned Latch Pin.Door Adjusted

/01T-0:on 801107,door Latch Mechanism Failed on Equipment Access Doors 237 & 238 Between Turbine Bldg & Reactor Bldg.Caused by Misaligned Latch Pin.Door Adjusted

ML18025B199
Person / Time
Site:	Browns Ferry
Issue date:	11/14/1980
From:	TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18025B198	List: 05000260/LER-1980-045, Forwards LER 80-045/01T-0 05000260/LER-1980-045-01, /01T-0:on 801107,door Latch Mechanism Failed on Equipment Access Doors 237 & 238 Between Turbine Bldg & Reactor Bldg.Caused by Misaligned Latch Pin.Door Adjusted
References
LER-80-045-01T-01, LER-80-45-1T-1, NUDOCS 8011210458
Download: ML18025B199 (4)

LER-1980-045, /01T-0:on 801107,door Latch Mechanism Failed on Equipment Access Doors 237 & 238 Between Turbine Bldg & Reactor Bldg.Caused by Misaligned Latch Pin.Door Adjusted

Event date:
Report date:
2601980045R01 - NRC Website

text

RC I'UHM366 17 7/)

2 24UCLEAR REGULATORY COMMISSION

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8 CON'T

~0 LICENSEE EVENT REPORT CONTROL BLOCK:

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8 0 0 60 61 DOCKET NUMBER 68 69 EVENT DATE 74'5 REPORT DATE 80 EVENT DESCRIPTION AND PRO8A8LE CONSEQUENCES 010 ih niti o

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in scheduled refuelin 2

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outa e

the door latch mechanism failed on the e ui ment access doors between the

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turbine buildin and the reactor buildin Door numbers 237 and 238 resultin

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in the loss of seconder containment.

There was no dan er to the health or safet

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of the ublic.

The door was immediatel shut.

A door watch was osted.

See T.S.

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.7.A.2.

Previous similar occurrence:

None

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40 41 42 43 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 027 o

The latch mechanism failed due to a misaligned latch pin.

The door was ad)usted to latch when the adjacent door was active.

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9 FACII.ITY STATUS 54 POWER OTHER STATUS 0

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10 12 13 44 ACTIVITY CONTENT RELEASEO OF RELEASE AMOUNTOF ACTIVITYQ 6

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11 12 13 PERSONNEL IN)VRIES NUMBER OESCRIPTIONQ41

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10 NAME OF PREPS 80 80 80 80 PHONE'8 69 80 NRC LISE ONLY llJJlJJJ

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Tennessee Valley Authority Browns Ferry Nuclear Plant Form BF-17 BF 15.2 1/10/79 LER SUPPLEMENTAL INFORMATION BFRO 260/

80045 Technical Specification Involved

3. 7.C.1 6 3. 7.A.2 Reported Under Technical Specification

6. 7;2.A.5 Date of Occurrence 11/4/80 Time of Occurrence 1245 Unit

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Identification and Descri tion of Occurrence:

Secondary containment was lost due to equipment access doors between the turbine building arid reactor building being open at the same time.

Primary containment was broken at the time.

Conditions Prior to Occurrence:

Unit 1 99% steady state power Unit 2 in scheduled, refueling outage 3

90 / steady state power Action specified in the Technical Specification Surveillance Requirements met due to ino erable e ui ment.

Describe.

A door watch was posted and continued until operability of the doors was pr'oven.

A arent Cause of Occurrence:

The interlock failed due to misalignment of the latch pin.

Anal sis of Occurrence:

There was no danger to the health or safety of the public, no damage to plant or equipment, and no release of activity.

Corrective Action

The interlock pin was ad)usted to latch when the paired door was opened.

Administrative control has been established and will remain in effect until Engineering Design recommended modifications,'have been implemented.

FaQure Data:

None

• Retention:

Revision:

eriod - Lifetime; Responsibility - Administrative Supervisor

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