05000324/FIN-2008002-01
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Finding | |
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| Title | Review Adequacy of Suppression Pool Temperature Monitoring System Calibration Relative to Technical Specification SR 3.3.3.1.3 Channel Calibration |
| Description | While reviewing the SPTMS, the inspectors noted that the licensee performs the channel calibration of the complete Suppression Chamber Water Temperature instrumentation loop, including the sensors in two steps. Surveillance Requirement 3.3.3.1.3 requires the licensee to perform channel calibration for each required Post Accident Monitoring (PAM) Instrumentation channel, every twenty-four months. The licensee performs the required calibration in accordance with 0MST-AMI27R and 28R, AMI Div 1 (and II) Suppression Pool Temp Monitor Cal which is an electronic calibration and functional test of the SPTMS microprocessor, recorders and associated input/output based on substitution of M&TE signals in place of the normal resistance temperature detectors (RTDs) inputs. This test does not address the RTDs themselves or the associated cables and connectors. The balance of the calibration is performed in accordance with 1OI-03.1 and 2OI-03.2, Control Operator Daily Surveillance Report. The daily surveillance is a channel check that identifies RTDs that misbehave in a non-gross manner (e.g., drift high or low without reaching the automated gross failure limit). The inspectors are reviewing this methodology of calibration to ensure that the entire loop has a calibration check performed every twenty-four months and that the channel responds to measured parameter changes with the required range and accuracy. As a result of inspectors questions, the licensee initiated AR 267562267562 Information associated with the validity of this type of calibration is still under review. Pending further NRC review of additional information provided by the licensee, this issue will be identified as URI 05000325,324/2008002-01, Review Adequacy of Suppression Pool Temperature Monitoring System Calibration Relative to SR 3.3.3.1.3 Channel Calibration |
| Site: | Brunswick  |
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| Report | IR 05000324/2008002 Section 1R15 |
| Date counted | Mar 31, 2008 (2008Q1) |
| Type: | URI: |
| cornerstone | No Cornerstone |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.15 |
| Inspectors (proximate) | J Austin R Moore R Musser R Lewis C Even M Coursey G Kolcum B Collins J Eargler Musserg Kolcum J Fuller H Gepford J Austin |
| INPO aspect | |
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Finding - Brunswick - IR 05000324/2008002 | ||||||||||||||||||||||||||||||||||||||
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Finding List (Brunswick) @ 2008Q1
Self-Identified List (Brunswick)
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