ML19309C846

LER 80-015/03L-0:on 800306,while Performing Engineered Safeguards Functional Test,Decay Heat Suction Isolation Valve Began to Close Inadvertently.No Apparent Cause for Event.Investigation Underway

ML19309C846
Person / Time
Site:	Crystal River
Issue date:	03/31/1980
From:	Lancaster K FLORIDA POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19309C839	List: ML19309C838 ML19309C846
References
LER-80-015-03L, LER-80-15-3L, NUDOCS 8004090315
Download: ML19309C846 (2)

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i O l SUPPLEMENTARY INFORMATION 1

6 Report No.: 50-302/80-015/03L-0 Facility: Crystal River Unit #3 Report Date: 31 March 1980 Occurrence Date: 6 March 1980 Identification of Occurrence:

lloth reactor coolant loops inoperable contrary to Technical Specification 3.4.1.

Conditions Prior to Occurrence:

Mode 5 cold shutdown.

Description of Occurrence:

At 1827 during the performance of Engineered Safeguards Functional Test SP-130, Decay lleat Suction Isolation Valve DilV-3 began to close inadvertently. The operating decay heat pump DilP-1A was stopped to prevent the possibility of any damage. DilV-3 was returned to its full open position immediately.

Decay heat system flow was returned to normal following the restart of DilP-1A at 1835.

Designation of Apparent Cause:

The apparent cause of this event is unknown.

Analysis of Occurrence:

No af fect upon the plant or general public. Decay heat system flow was restored in eight (8) minutes.

Corrective Action:

Since the apparent cause for this event is unknown, corrective action cannot be defined at this time. A review of this event will continue and corrective action, if any, will be submitted as a supplement to this report.

Failure Data:

This is the first occurrence of this type reported.

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