05000483/FIN-2012003-03
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Finding | |
|---|---|
| Title | Licensee-Identified Violation |
| Description | Technical Specification 3.6.6, Containment Spray and Cooling Systems, requires that two containment cooling trains shall be operable in Modes 1, 2, 3 and 4. Contrary to the above, on March 28, 2012, Callaway workers discovered that a modification procedure for containment coolers train A rendered the system unable to perform its safety-related functions following a design basis accident in adverse conditions. Specifically, it disabled the ability for the fan to start in slow speed following a trip from high speed due to thermal overload under certain accident conditions. The licensee then determined that this modification had disabled the same feature on containment coolers train B on March 16, 2012. This resulted in both trains of containment coolers being inoperable for a period of time. The cause was attributed to poor communication and work controls processes during modifications. The details of this issue are documented in License Event Report 05000483/2012-001-00, Modification Implementation Error Adversely Impacted the Containment Cooling System. This finding is more than minor because it is associated with the human performance attribute of the Barrier Integrity Cornerstone and affects the associated cornerstone objective to provide reasonable assurance that physical design barriers protect the public from radio nuclide releases caused by accidents or releases. Using Manual Chapter 0609.04, Phase 1 - Initial Screening and Characterization of Findings, inspectors determined that this finding is of very low safety significance because it did not represent an actual open pathway in the physical integrity of reactor containment. This finding was entered in the licensees corrective action program as Callaway Action Request 201202333. |
| Site: | Callaway  |
|---|---|
| Report | IR 05000483/2012003 Section 4OA7 |
| Date counted | Jun 30, 2012 (2012Q2) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | C Brown C Baron N O 'Keefe J Chiloyan A Stone T Hartman E Sanchez Z Hollcraft N Makris K Clayton D Dumbacher A Dunlop R Langstaf |
| INPO aspect | |
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Finding - Callaway - IR 05000483/2012003 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Callaway) @ 2012Q2
Self-Identified List (Callaway)
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