ML19319B754

RO NP-33-77-33:on 770728,shield Bldg Integrity Deliberately Lost to Perform Required Hydrogen Purge Sys Test.Shield Bldg Integrity Restored on 770728

ML19319B754
Person / Time
Site:	Davis Besse
Issue date:	08/23/1977
From:	George T, Lingenfelter J TOLEDO EDISON CO.
To:
Shared Package
ML19319B645	List: ML19319B644 ML19319B754
References
LER-RO-770823, NUDOCS 8001270215
Download: ML19319B754 (2)

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g j3.6.5.2 to perform a required surveillance test on the Hydroqun Parge  ;

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O TOLEDO EDIS ' "?ANY DAVIS-BESSE UNIT ONE y"r t.. POWER ST.iTION SUPPLEMENTAL INFOPX\TIr  !" *ER NP-33-77-33 DATE OF EVENT: July 28, 1977 FACILITY: Davis-Besse Unit 1 IDENTIFICATION OF OCCURRENCE: Deliberate loss of shield building integrity for ST 5065.03, H2 Purge System 18 Month Test Conditions Prior to Occurrence: The plant was in Mode 3, with Power (MWT) = 0, and Load 0"4E) = 0.

Descriction of Occurrence: At 0700 hours0.0081 days <br />0.194 hours <br />0.00116 weeks <br />2.6635e-4 months <br /> on Jul/ 28, 1977, shield building integrity was not =aintained due to the running of ST 5065.03, H2 Purge Syste=

18 Month Test. A drain hose was run through Door No. 303 (Mechanical ?enetratien Roon 4) to drain the saal water for H2 Dilution Blower 1-1. The seal water which normally returns to the Auxiliary Building floor drain was drained to the outside.

This placed the Station in the Action Statement of Technical Specification 3.6.5.2.

s Designaticn of Apoarent Cause of Occurrence: This entry into the Action Statenant of Technical Specification 3.6.5.2 was done deliberately to reduce the load on the Miscellaneous Waste System.

Analysis of Occurrence: Sinc e initial criticality had not yet been attained, there was no possibility of an accident occurring that would require this secondary radiation boundary. Ih;refore, this less of shield building integrity caused no threat to the health and safety of the public or Statien personnel.

Corrective Action: At 1855 hours0.0215 days <br />0.515 hours <br />0.00307 weeks <br />7.058275e-4 months <br /> on July 28, 1977, shield building integrity was restored. This removed the Station from the Action Statement of Technical Specification 3.6.5.2.

Failure Data: Shield building integrl :y was lost on one prior event (N?-33-77-32) due to construction cables through the penetration room and access doors.

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