ML19344A050

LER#78-045/03l-0 on 780907:closed Indication Not Received for Control Complex Air Supply Damper D-1 After Closed Command Was Issued.Caused by Mech Binding of Air Supply Damper.Preventive Maint Will Provide Corrective Action

ML19344A050
Person / Time
Site:	Crystal River
Issue date:	09/27/1978
From:	Cooper J FLORIDA POWER CORP.
To:
Shared Package
ML19344A049	List: ML19344A048 ML19344A050
References
LER-78-045-03L, LER-78-45-3L, NUDOCS 7810110152
Download: ML19344A050 (2)

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aVENTOt$Ca PTICN ANo PaotAatt con 51oGENCEt h gl At 1600, during the performance of SP-417. Refueline Tnegrv,1 Tne gr,r,a l Plant Response to Engineered Safeguards Actuation, a closed indication was t

, , , , not received for the Control Complex air supply damper D-1 after a closed 1 command was issued. This is contrary to Technical Specification 3.7.7.1. 1 .

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I g lThe cause of this event was due to mechanical binding of the air suop1v I

, damper D-1. Preventive maintenance will provide corrective action.

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SUPPLDfENTAKY INF0FT.\TIO:t SHEET)

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SUPPLEMENTARY INFORMATION

1. Report No.: 50-302/78-045/03L-0

2. Facility: Crystal River Unit #3

3. Report Date: 27 September 1978

4. Occurrence Date: 7 September 1978

5. Identification of Occurrence:

Failure to have two operable Control Room emergency ventilation systems which is contrary to Technical Specification 3.7.7.1.

6. Conditions Prior to Occurrence:

Mode 4 hot shutdown.

7. Description of Occurrence:

At 1600, during the performance of Surveillance Procedure, SP-417, Refueling Interval Integrated Plant Response to Engineered Safeguards Actuation, it was discovered that the Control Complex air supply damper D-1, did not respond to a close command. This was substantiated by observing that a closed position indication had not been received in the Control Room. Operability was restored on 8 September 1978, after a successful post maintenance test.

8. Designation of Apparent Cause:

This occurrence was caused by the mechanical binding of the air supply damper, D-1, which prohibited it from closing and making contact with closed limit switch.

9. Analysis of Occurrence:

The health and safety of plant and public was not endangered as no accident conditions existed at the time of this occurrence.

10. Corrective Action:

Preventive maintenance will identify the requirement for frequent lubrication as corrective action.

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11. Failure Data:

No previous occurrence of this event.

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