Browse wiki

Technical Specifications 3.4.15, RCS Leaka … Technical Specifications 3.4.15, RCS Leakage Detection Instrumentation, required that one containment atmosphere particulate radiation monitor, and one containment air cooler condensate level monitor (CCLM) or one containment atmosphere gaseous radiation monitor be operable in Modes 1 through 4. Contrary to those requirements, on August 7, 2015, Unit 2 was in Mode 1 when the licensee entered into a condition where all of the required monitors were inoperable, and failed to comply with the required actions of limiting condition for operation (LCO) 3.0.3. According to root cause report (CAR 261364), the licensee determined that CCLM system was inoperable on July 6, 2015, when the containment sump in leakage exceeded approximately one gallon per minute (gpm). On August 7, 2015, the licensee removed radiation detectors R-11 (particulate) and R-12 (gaseous) from service for maintenance. The radiation detectors in conjunction with all four containment cooler level indicators being inoperable met the entry conditions for Condition E of Technical Specifications 3.4.15, which required entry into LCO 3.0.3 immediately. This condition existed for 7 hours and 54 minutes, which exceeded the requirement of LCO 3.0.3 to be in Mode 3 within 7 hours. It was later confirmed that the A, B and D CCLMs were inoperable due to clogged drain lines and the C CCLM was tagged out for troubleshooting and repair on August 6, 2015. The inspectors determined that the licensee had previous opportunities to prevent the inoperability of the CCLM system due to the clogged drain lines. According to CAR 261706, a corrective action from February 2007 was not implemented which was a preventive maintenance task to clean and inspect the drain lines and level transmitter sensing lines. The finding was determined to be Green, very low safety significance, because the finding was not associated with loss of coolant accident (LOCA), plant transient, or support systems initiators. The licensee entered this issue into the corrective action program as CR 10155638. corrective action program as CR 10155638.

Discovered date

23:59:59, 30 June 2016 +

Docket

05000364 +

Event date

23:59:59, 30 June 2016 +

Finding integer

3 +

Finding type

Non-cited violation +

Has query"Has query" is a predefined property that represents meta information (in form of a <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Subobject">subobject</a>) about individual queries and is provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.

Hours

8.101852e-5 d (0.00194 hours, 1.157407e-5 weeks, 2.6635e-6 months) +

Identified by

Licensee-identified +

Inspection report

IR 05000348/2016002 +

Inspector

Joel Munday +, J Rivera-Ortiz +, Phil Niebaum +, Keith Miller + and Racquel Powell +

Modification date"Modification date" is a predefined property that corresponds to the date of the last modification of a subject and is provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.

15:54:28, 30 May 2018 +

Person