05000289/FIN-2009002-01
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Finding | |
|---|---|
| Title | Instrument Accuracy Not Verified prior to Performing Containment Penetration Local Leak Rate Testing |
| Description | The inspectors identified an NCV of Technical Specification 6.8.5 which requires the Reactor Building Leak Rate Testing Program to be properly implemented. Specifically, station personnel repeatedly used temperature instruments that did not meet accuracy and repeatability requirements when performing containment penetration leak rate testing (LRT). Additionally, in some cases, station personnel did not document what temperature instruments were used and therefore the test results did not adequately demonstrate that LRT test requirements had been met. Upon discovery, engineers performed a bounding engineering analysis which verified the containment barrier remained operable and entered the issue into the corrective action program (IR 892386). This finding is more than minor because the issue is associated with the barrier performance reliability attribute of the Barrier Integrity cornerstone and adversely affected the associated cornerstone objective to provide reasonable assurance that the physical containment barrier protects the public from radionuclide releases. Repeated failure to ensure test instruments met procedure and regulatory requirements was programmatic, affected multiple components, adversely affected LRT test accuracy, and consequently impacted the licensees ability to verify the reactor building containment barrier remained operable. The finding was of very low safety significance because the finding did not represent an actual open pathway in the physical integrity of the containment barrier and did not result in a loss of containment barrier operability. This finding had a cross-cutting aspect in the area of Human Performance, Work Practices component because station personnel repeatedly did not properly implement procedure requirements to verify material and special prerequisites for instrument accuracy and repeatability were met prior to performing containment penetration LRT H.4(b). (Section 1R19 |
| Site: | Three Mile Island  |
|---|---|
| Report | IR 05000289/2009002 Section 1R19 |
| Date counted | Mar 31, 2009 (2009Q1) |
| Type: | NCV: Green |
| cornerstone | Barrier Integrity |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.19 |
| Inspectors (proximate) | J Caruso P Presby J Brand D Kern R Bellamy C Newport |
| CCA | H.8, Procedure Adherence |
| INPO aspect | WP.4 |
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Finding - Three Mile Island - IR 05000289/2009002 | |||||||||||||||||||||||||||||||||||
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Finding List (Three Mile Island) @ 2009Q1
Self-Identified List (Three Mile Island)
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