ML18136A123

LER 79-028/03L-0:on 791003,concluded That Ten of 209 Anchor Bolts Inspected Failed to Meet Acceptance Criteria.Caused by Improper Installation.Deficiencies Corrected as Required

ML18136A123
Person / Time
Site:	Surry
Issue date:	11/02/1979
From:	Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18136A122	List: ML18136A121 ML18136A123
References
LER-79-028-03L-01, LER-79-28-3L-1, NUDOCS 7910310280
Download: ML18136A123 (2)

Text

NRCI.Gfr~ U.S. NUCLEAR REGULA I ORV COMMISSION (7-77)

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~~~~~ ~© I 015 I O I O I O 12 I 8 I O 101 1 IO IO 13 17 I 9 I© I 1 I 1 I OI 2 1 7 I 9 IG) 60 61 DOCKET NUMBER . 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES@

I During the performance of Special Test 75, Anchor Bolt Test and Inspection, !AW IE

~ I Bulletin 79-02, 10 of 209 bolts inspected failed to meet Acceptance Criteria specified.I

[QJJJ !This is reportable pursuant to Technical Specification 6.6.2.b.2. The health and

[QJ]J ,safety of the general public were not affected, since the unit was in a cold shutdown (

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9 2 2 10 11 12 13 18 19 20 SEQUENTIAL OCCUR REN CE REPORT REVISION LER/RO CVENT YEAR REPORT NO; CODE TYPE NO.

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]The anchor bolts were apparently not properly installed at the time of initial construcr o:JJJ 1tion. The deficiencies have been evaluated by Engineering and corrected as regujred.

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7 8 9 80 FACILITY STATUS  % POWER OTHER STATUS @) METHOD OF DISCOVERY DISCOVERY DESCRIPTION

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7 8 9 11 12 13 80 PERSONNEL INJURIES Q NUMBER DESCRIPTION6

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7 8 9 11 12 80 LOSS OF OR DAMAGE TO FACILITY '4:JI TYPE DESCRIPTION v:::J

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e (Attachment, Page 1 of 1)

Surry Power Station, Unit No. 1 Docket No: 50-280 Report No: 79-028/03L-O Event Date: 10-03-79 Type of Report: Safety Related Anchor Bolt Deficiencies

1. Description of Event:

During the performance of Special Test 75, Anchor Bolt Test and inspection, in accordance with NRC F~E. Bulletin 79-02, 10 of 209 bolts inspected failed to meet with the specified Acceptance Criteria. This is reportable pur~uant to Technical *specification 6.6.2.b.2. Other anchor bolt deficiencies were noted, evaluated, and determined to meet the specified Acceptance Criteria thereby not affecting the integrity of the associated supports.

2. Probable Consequences and Status of Redundant Systems:

Since more than 95% of the anchor bolts met or exceeded the specified Acceptance Criteria the overall integrity of the supports involving safety related systems was not jeopardized .. Therefore, the health and safety of the general public were not affected.

3. Cause:

It appears that the anchor bolts were not properly installed at the time of initial construction.

4. Immediate Corrective Action:

All deficiencies noted were evaluated by Engineering and corrected as required.

5. Subsequent Corrective Actions:

A continuing program of inspection and repair is being developed and implemented.

6. Actions Taken to Prevent Recurrence:

Full compliance with NRC I.E. Bulletin 79-02 will preclude a recurrence.

7. Generic lmpl ications:

Unit No. 2 is presently being inspected and evaluated,