View source for 05000280/LER-1977-012, RO S1-77-01 Re Failures of Hydraulic Shock Supports (Snubbers).Extent of Failures Reported in LER 77-12.All Snubbers Operable on 771207 Startup

{{Adams
| number = ML20086S077
| issue date = 01/05/1978
| title = RO S1-77-01 Re Failures of Hydraulic Shock Supports (Snubbers).Extent of Failures Reported in LER 77-12.All Snubbers Operable on 771207 Startup
| author name = 
| author affiliation = VIRGINIA POWER (VIRGINIA ELECTRIC &amp; POWER CO.)
| addressee name = 
| addressee affiliation = 
| docket = 05000280
| license number = 
| contact person = 
| document report number = RO-S1-77-01, RO-S1-77-1, NUDOCS 8403010352
| package number = ML20086S067
| document type = REPORTABLE OCCURRENCE REPORT (SEE ALSO AO LER), TEXT-SAFETY REPORT
| page count = 1
}}
{{LER
| Title = RO S1-77-01 Re Failures of Hydraulic Shock Supports (Snubbers).Extent of Failures Reported in LER 77-12.All Snubbers Operable on 771207 Startup
| Plant = 
| Reporting criterion = 
| Power level = 
| Mode = 
| Docket = 05000280
| LER year = 2077
| LER number = 12
| LER revision = 
| Event date = 
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| ENS = 
| abstract = 
}}

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O O                                                                         !
SPECIAL REPORT S1-77-01 SURRY UNIT 1 HYDRAULIC SHOCK SUPPORTS (SNUBBERS)
The first functional testing of hydraulic shock suppressors required by Technical Specification 4.17.D was conducted on Surry Unit 2 in the September refueling outage. The extent of failures was reported in LER-77-12 (Docket No.
50-281). At that time, a committment was made to verify the condition of Unit I snubbers.
Activity was initiated on those snubbers outside of containment and con-centrated on those snubbers which'have not yet been converted to ethylene pro-phlene seals. Prior to commencement of the Unit 1 Steam Generator Evaluation outage in mid-November, thirty-four snubbers were replaced with new or rebuilt i
snubbers thht met functional testing criteria.
During the outage, snubbers were initially screened into three categories (1)       those requiring seal replacement and/or those which appeared marginal and that indicated a high probability of failure might occur in testing; (2)                             those which upon removal and visual examination appeared satisfactory, and (3)                             those not requiring functional testing only a visual inspection.                     Seventy-eight snubbers were screened into the first category, and were rebuilt or repaired as necessary.
All met functional testing acceptance critera.                Of the snubbers in the second category, one met functional testing acceptance criteria and twenty-nine requir-                          l ed only adjustment to meet functional testing acceptance critera.                        Thirty-six       i snubbers in the third category were visually inspected and appeared satisfactory.
Surry Unit I was started up on December 7, 1977, with all snubbers operable.
l 8403010352 780105 PDR ADOCK 05000280 S                       PM
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