ML18139B216

Updated LER 80-022/03X-1:on 800327,snubbers 1-RC-HSS-116 & 1-RC-HSS-117 Found Out of Position During Inaccessible Snubbers Visual Insp 1-PT-39B-1.Caused by Improper Installation Due to Design Change Deficiency

ML18139B216
Person / Time
Site:	Surry
Issue date:	03/27/1981
From:	Joshua Wilson VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18139B212	List: ML18139B211 ML18139B213 ML18139B214 ML18139B215 ML18139B216
References
IEB-79-14, LER-80-022-03X, LER-80-22-3X, NUDOCS 8104020648
Download: ML18139B216 (2)

Text

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EVENT DESCRIPTION AND PROBABLE CONSEQUENCES@)

            /During the performance of l-PT-39B-l, Inaccessible Snubbers Visual Inspection, snub-

[[II] lbers l-RC-HSS-116 and l-RC-HSS-117 were discovered installed improperly, i.e. 90° out! [[II] jof position. The snubbers were declared inoperable. .This event is reportable in CI:I]J 1accordance with Tech. Spec. 6.6.2.b.(2). Since no seismic disturbances were experi- []J:[) lenced while the unit was at power, the health and safety of the public were not [[]I) affected [IT[] 7 8 g 80 SYSTEM CAUSE CAUSE COMP. VAi.VE cooE cooe suecooe COMPONENT cooe suecooE SUBCOOE [ill] 7 8 le 9 IB 10 I@ LLJ@ Ll.J@) 12 js ju IP !o !R !T I@ 13 18 lE...J@) l!.J@ 19 20 11 SEQUENTIAi. OCCURRENCE REPORT REVISION I.ER/RO CVENT YEAR REPORT NO. COOE TYPE NO.

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3:3 34 UJ@ 3S L!.1 I 01 01 01 01 36 37 40 l!.J@. 41 l..!..J@) 42 W@) 43 I GI 2 15 I 5 1 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS @ DJ]] JThe snubbers were installed improperly due to deficiency of the design change utilizeq CIIlJ Ito correct pipe support deficiencies discovered under IE Bulletin 79-14. The snubber§ o:::uJ 1will be purged and installed properly prior to unit start-up. D:u]I..._________________________________________ CIEJ8 7 9 80

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e SURRY POWER STATION UNIT NO. 1 DOCKET NO: 50-280 REPORT NO: 80-022/03X-l EVENT DATE: 03-27-80 TITLE OF EVENT: SNUBBERS l-HSS-RC-115/116 IMPROPERLY INSTALLED

1. DESCRIPTION OF EVENT:

During the performance of l-PT-39B-l, Inaccessible Snubbers Visual Inspection, snubbers l-RC-HSS-116 and l-RC-HSS-117 were discovered installed improperly, i.e. 90° out of proper position. The snubbers were declared inoperable. This event is reportable in accordance with Tech. Spec. 6.6.2.b,2.

2. PROBABLE CONSEQUENCES:

The snubbers were installed with the reservoir below the valve block. This could have caused air intro~uction into the valve block or cylinder thus preventing the snubbers from performing their intended function. However, since no seismic disturbances were encountered while the Unit was at power, the health and safety of the public were not affected.

3. CAUSE OF EVENT:

The snubbers were ins~alled improperly due to a dificiency of the design change utilized to correct pipe support deficiencies discovered under IE Bulletin 79-14.

4. IMMEDIATE CORRECTIVE ACTIONS:

The snubbers were declared inoperable.

5. SUBSEQUENT CORRECTIVE ACTIONS:

The snubber end mounting bracket will be removed, rotated 90° and reinstalled. The snubber will be purged and reinstalled in the proper orientation pr,ior to Unit Startup.

6. ACTION TAKEN TO PREVENT RECURRENCE:

Design personnel have been apprised of the importance of proper snubber orientation. 7, GENERIC IMPLICATIONS: The Visual Inspection performed at Unit shutdown covers all snubber installations. Since no other snubbers were discovered installed improperly, this event possesses no generic implications.}}