05000302/LER-1981-052-03, /03L-0:on 810804,decay Heat Pump DHP-1A Would Not Rotate by Hand During Preventative Maint.Caused by Worn Bearings.Bearings Replaced.Investigation Continuing

/03L-0:on 810804,decay Heat Pump DHP-1A Would Not Rotate by Hand During Preventative Maint.Caused by Worn Bearings.Bearings Replaced.Investigation Continuing

ML20010F698
Person / Time
Site:	Crystal River
Issue date:	09/04/1981
From:	Hernandez V FLORIDA POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20010F695	List: 05000302/LER-1981-052, Forwards LER 81-052/03L-0 05000302/LER-1981-052-03, /03L-0:on 810804,decay Heat Pump DHP-1A Would Not Rotate by Hand During Preventative Maint.Caused by Worn Bearings.Bearings Replaced.Investigation Continuing
References
LER-81-052-03L, LER-81-52-3L, NUDOCS 8109110203
Download: ML20010F698 (2)

LER-1981-052, /03L-0:on 810804,decay Heat Pump DHP-1A Would Not Rotate by Hand During Preventative Maint.Caused by Worn Bearings.Bearings Replaced.Investigation Continuing

Event date:
Report date:
3021981052R03 - NRC Website

text

W LICENSEE EVENT REPORT g

CONTROL BLOCK: l l

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60 61 DC 2KET NUMBER 68 69 EVENT DATE 74 75 REPORT D ATE 80 J

EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h d

iO I2l l At 1100 on 8/5/81 during perforrance of penvne, Hun raintenance initiated ae n6nn on l l

[Ol3l l 8/4/81, it was discovered that decay heat pump DTIP-lA would not rotate by hand.

This l

1014 l l createC a condition involuntarily contrary to T.S.3.5.2.

f!aintenance was initiated,andl iOI5I Ioperability was restored at 1930 on 8/5/81. Redundancy was provided by ECCS subsysten l l 0 l6 l l B-There was no ef f ect upon the henith nr nnforv of the ceneral nublic.

This was the l l0l7l l first occurrence for DHP-1A.and this is the seventeenth evont ronnre na unct or rhtc l

l lO18j l Specification.

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8 9 SYSTEM

CAUSE

CAUSE COMP.

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CODE TYPE NO.

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Li l O ; ]The cause of this event is attributed te vern honrinas.

Tho kn,rinec-onen v n n 1, mi this time and is under investigation.;

l i )i ! lThe cause of the worn bearings is indeterminate at li 171 !

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% POWER OTHER STATUS ISCO RY DISCOVERY DESCRIPTION l115 l l E lh l 1l ol olhl N/A l

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ACTIVilY CO TENT LOCATION OF RELEASE RELEASED OF RELE ASE AMOUNT OF ACTIVITY l1 j 6 ] l Z l h l Zl@l N/A l

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8 9 10 11 44 45 PERSONNEL EXPOSURES NUYSER TYPE

DESCRIPTION

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2 PERSONNE L IN;u'R,ES NuveER ctSCRiPTION N/A l

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8 9 11 12 LOSS OF CR DAVAGE TO FACILITY N/A l

TYPE D E SC RIP TION l Z l@l -

8 8109110203 810904 NRC USE ONLY 8

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PHONE:

NAM 2 OF PREPARER MM ATTACHED SUPPLDIENTARYCdNFORMATION SHEET)

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i SUPPLEMENTARY INFORMATION REPORT: #50-302/81-052/03L-0 i

FACILITY:

Crystal River Unit 3 REPORT DATE: Septem ber 4,1981 Occurrence Date: August 4,1981 i

IDENTIFICATION OF OCCURRENCE:

I Decay Heat Ptnp DHP-1 A was inoperable contrary to T.S.3 5.2.

CONDITIONS PRIOR TO OCCURRENCE:

Mode 1 Power Operation (1000.

2 DESCRIPTION OF OCCURRENCE:

At 0600, Decay Heat Pump was removed from service for preventative maintenance.

At 1100 on August 5,

1981, during the preventative maintenance, it was discovered that the. pump shaft would not rotate freely.

Maintenance was initiated and operability was restored at 1930 on August 5,1981.

DESIGNATION OF APPARENT CAUSE:

The cause of this event is attributed to worn bearings. The cause of j

the worn bearings is indeterminate at this time and is under investi-i gation.

ANALYSIS OF OCCURRENCE:

Redundancy was provided by ECCS subsystem B.

There was no effect upon the health or safety of the general public.

4

CORRECTIVE ACTION

j The bearings were replaced.

t FAILURE DATA:

This was the first occurrence for DHP-1A,and this is the seventeenth event reported under this Specification.

t

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