ML19308D254

RO-77-55:on 770602, a Emergency Diesel Generator Failed to Start for Mechanalysis Run.Cause Unknown.Nuts Tightened on a & Verified on B.Work Request Initiated to Recheck 50% of Nuts on Each Diesel Wk of 770703

ML19308D254
Person / Time
Site:	Crystal River
Issue date:	06/22/1977
From:	Stewart W FLORIDA POWER CORP.
To:
Shared Package
ML19308D249	List: ML19308D248 ML19308D254
References
NUDOCS 8002270706
Download: ML19308D254 (2)

Text

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7 89 pay, MA 7 L 2 VCMTON (LER 77-55)

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fuel for l5IS l The cause of this event was loose injector hold-down nuts causing insufficient 7 89

{ l starting. Nuts were tightened and "B" Diesel checked to prevent s1=ilar occurrence.

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l' SUPPLEMENTARY INFORMATION (O

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1. Report No.: 50-302/77-55

2. F'acility: Crystal River Unic #3

3. Report Date: 22 June 1977 4 Occurrence Date: 2 June 1977

5. Identification of Occurrence: -

The "A" Cmergency Diesel Generator failed to start contrary to Technical' Specifica-tion 3.8.1.1.a.

6. Conditions Prior t,o Occurrence: , , ,

Normal Mods 1 ' operation. '

7. Description of Occurrence: l At 0645 while running the monthly surveillance proceduse on the Emergency Diesel _

Cenerator Test 3P-354, "A" diesel failed to start for the mechanalysis run. The .

Crystal River Unit 1 & 2 Shift Supervisor was immediately' notified of entry into action statement and to perform cable tunnel surveillancs. Investiga' tion revealed loose injector hold-down ruts3 which prevented sufficient fuel to start the diesel.

The nuts were tightr ned and the "A" Diesel Generator was restored operable in two (2) hours. The injector hold-down nuts on' the "B" Diesel Generator were checked and

~~ -) verified tight.

8. Designation of Appa ent Cause:

The cause of this occurrence is unknown.

9. Analysis of Occurrence:

There were no safety implications to the plant or general public, as the '!B" Emergency Dies'e l Generator was operable and available.

10. Corrective Action:

In addition to tightening the nuts on "A" diesel,' the corresponding nuts on "B" ,

diesel were verified tight. Further, a Work ~ Request has been initiated to re-check at least 50% of the nuts on each diesel the week of 3 July 1977,

11. Failure Data:

This is the first occurrence of this type.

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