ML19308D261

RO-77-61E:on 770626,unplanned Release of Radwaste Gas Occurred Contrary to ETS 5.6.2.A.Cause Being Investigated to Determine Corrective Action

ML19308D261
Person / Time
Site:	Crystal River
Issue date:	07/06/1977
From:	Stewart W FLORIDA POWER CORP.
To:
Shared Package
ML19308D252	List: ML19308D251 ML19308D261
References
NUDOCS 8002270711
Download: ML19308D261 (2)

Text

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s SUPPLEMENTARY INFORMATION a

1. Report No.: 50-302/77-61E

2. Facility: Crystal River Unit #3

3. Report Date: 6 July 1977 .

4. Occurrence Date: 26 June 1977 5, Identification of Oc . ,:

Unplanned release at < ' e vaste gas contrary to Environmental Technical Specification 5.6.2.A.

6. Conditions Prior to Occurrence:

Mode '4 Hot Shutdown i

7. Description of Occurrence:

. At 0115 while venting the makeup tank to the waste gas icw pressure header, an unplanned radioactive gas release to the Auxiliary Building occurred. The i

maximum instantaneous release rate at the peak of the discharge profile was 87.

of the most restrictive limit se t forth in Specification 2.4.2A(1). Supply air

\s, was re-established to the Auxiliary Building and ventilation resumed.

8. Designation of Apparent Cause:

Unknown at this time. Previous release, LER 77-49E was associated with a blown loop seal, however, this release occurred with all seals functional in the waste gas header system.

9. Analysis of Occurrence:

The health and safety o f the plant and general public were not affected as the maximum instantaneous release rates were not exceeded.

10. Corrective Action:

An investigation is underway to establish the cause in order to define necessary corrective action. .As yet, no conclusion has been reached.

11. Failure Data:

This was the second occurrence of an unplanned release originating from the waste gas system. See LER 77-49E dated 14 June 1977'.

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