ML19317G311

LER 78-011/03L-0:on 780201,during Mode 3 Operation,Primary Containment Integrity Not Maintained When Nitrogen Valve NGV-81 Open for 3-h 42 Minutes.Caused by Oversight of Tech Spec 3.6.1 1 Requirements.Personnel Instructed

ML19317G311
Person / Time
Site:	Crystal River
Issue date:	02/22/1978
From:	Cooper J FLORIDA POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19317G307	List: ML19317G306 ML19317G311
References
LER-78-011-03L, LER-78-11-3L, NUDOCS 8002280923
Download: ML19317G311 (2)

Text

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SUPPLEMENTARY INFORMATION 1 tore No.: 50-302/78-011/03L-0 2.

v Facility: Crystal River Unit #3

3. Report Date: 22 February 1978

4. Occurrence Date: 1 February 1978

5. Identification of Occurrence:

Primary Contahnt Integrity was not maintained as prescribed by Technical Specifica-tion 3.6.1.1. in that Nitrogen Valve NGv-81 was opened in Mode 3 operation.

6. Conditions Prior to Occurrence:

Mode 3 operation. 1

7. Description of Occurrence:

At 1027, it was discovered that nitrogen valve NGV-81 was in the open position. Further investigation revealed that NGV-81 had been opened at 0645 during the previous shift, by i Operations personnel to provide a source of nitrogen to aid in the calibration of instru- . "

mentation located in the Reactor Building. During this ti:na frame, due to a pre-planned outage, the plant was in Mode 3 operation and the Technical Specification requirement for this valve to be closed was overlooked. Upon discovery, Valve NG7-81 was i= mediately closed and locked in the closed position. .The valve was in the open position for 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> and 42 :tinutes.

S.wassignation of Apparent Cause:

This event was due to an oversight of Operations personnel of the Tech Spec requirements.

This oversight could have been attributed to the large nu=ber of outage functions in progress.

9. Analysis of Occurrence:

The safety 1:rplications of this occurrence were minisal.

10. Corrective Action:

Operations Supervisory personnel have been instructed as to the proper method for hand-ling manual isolation valves while in applicable operational nodes. Discrepancy F4 port

1. C-00823 has been submitted to further point out the consequences of this event and document corrective action taken.

11. Failure Data:

f This is the first occurrence. of an event of this type.

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