ML19308D528

RO-77-33:on 770406,absolute Position Indicator for Rod 5, Group 8 Failed.Caused by Amphenol Connector Faulty Pin Connection.Connector Repaired & Indicator Restored to Operation

ML19308D528
Person / Time
Site:	Crystal River
Issue date:	04/28/1977
From:	Stewart W FLORIDA POWER CORP.
To:
Shared Package
ML19308D524	List: ML19308D523 ML19308D528
References
NUDOCS 8002280966
Download: ML19308D528 (2)

Text

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HE I trary to Technical Specification 3.1.3.3. No redundant systems available. First occur- ll '

7 89 80 C4 l 7 89 rence of this type. Complied with Technical Specification Action Statement 3.1.3.3.A.2.B.

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ll hl System restored operable on 8 April 1977.

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CAUSE CESCRIPTION j8 5.

@l Inoperable absolute position indicator caused by amphenol connector faulty oin connection. I

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7 89 00 3l l Connector was repaired and operability restored.

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, , SUPPLEMENTARY INFORMATION 1

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1. Report No.: 50-302/77-33

2. Facility: Crystal River Unit #3

3. Report Date: 28 April 1977

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4. Occurrence: 6 April 1977

5. Identification of occurrence:

In the process of moving Group 8, Axial Power Shaping Rods (APSR's),

the absolute position indicaor for Rod 5 failed causing a condition contrary to Technical Specification 3.1.3.3.

6. Conditions Prior to Occurrence:

Normal Mode I operation. -

7. Description of Occurrence: 2 At 0812, while adjusting a power imbalance wit! Group 8 Rods, absolute pcsition indicator for Rod 5 failed. Rod posi*. ion was verified by the Rod Zone Limit Switch. Commenced logging position agreement between r reference indicator and the operable position indication as per SP-300.

l ( Position indicator for Rod 5 was restored operable during shutdown on 8 April 1977.

8. Designation of Apparent Cause of Occurrence:

The amphenol connector to the position indicator was found to have a faulty pin connection.

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9. Analysis of Occurrence:

There were no safety implications as the Reactor could have been safely shut down at any time.

10. Corrective Action:

The amphenol connector was repaired and absolute position indicator for Rod 5 of Group 8 was restored operable.

11. Failure Data:

This occurrence wat non-repetitive for the APSR group.

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