ML19225A204

LER 79-061/01T-0 on 790702:pipe Supports Did Not Meet Requirements of IE Bulletin 79-02,Revision 1.Caused by Improper Design.Evaluation Is Being Performed to Upgrade Supports to Safety Factor of Four

ML19225A204
Person / Time
Site:	Crystal River
Issue date:	07/09/1979
From:	Cooper J FLORIDA POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19225A198	List: ML19225A197 ML19225A204
References
LER-79-061-01T, LER-79-61-1T, NUDOCS 7907180553
Download: ML19225A204 (2)

Text

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. ~1 SL"PPLEMENTARY INFOR"ATION Report No.- 50-302/79-061/01T-0 Facility- Crystal River l' nit 13 Report Date: 9 July 1979 Occurrence Date: 2 July 1979 Identification of Occurrence:

Degradation of nioing supports reportable under Technical Soecification 6.9.1.8.1 Conditions Prior to Occurrence:

Mode 5 cold shutdown.

Description of Occurrence:

At 1000, it was reported that ninety-two (92) pipe supports did not meet the requirements referenced in Item 2 of !E Bulletins 79-02 and 79-02, Rev. 1. Further analysis has revealed that a total of 135 pipe suoports have a safety factor of less than four (4). Of these, fifty-four (54) have a safety factor of less than two (2),

Designation of Apparent Cause:

The cause of this event is attributed to improper design.

Analysis of Occurrence:

No effect upon the plant or general public as the plant remained in a safe shutdown condition.

Corrective Act ion:

An engineering ev11uation is being performed to upgrade all supports to a safety factor of four (4). Th e inspection and analysis is expected to be completed Ly 13 July 1979. To date, fifteen (15) of the fifty-four supports with a safety factor less than two (2) have been repaired. Further action and subse-quent information will be recorted through Florida Power Corporation responses to IE Bulletins 79-02 and 79-02, Rev. 1.

Failure Data:

This is the first occurrence of this type reported.

/re 346 046