Technical Specification 3.3.7.1, Monitoring Instrumentation Radiation Monitoring Instrumentation, requires one
operable reactor enclosure cooling water (
RECW) system radiation monitor channel at all times. Action 72 of Table 3.3.7.1-1 requires obtaining a
grab sample every
24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> with the required monitor
inoperable. Contrary to
TS 3.3.7.1, the required
RECW Radiation Monitor was
inoperable in Unit 2 from March 24, 2008 until April 15, 2008 without obtaining a
grab sample every
24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. The event is documented in Exelons
CAP as IR 763510. The finding was of very low safety significance because it does not represent an open pathway in the physical integrity of reactor containment
