10 CFR 50 Appendix B, criterion V requires that activities affecting quality shall be prescribed by documented instructions, procedures, or drawings, and that these instructions, procedures, or drawings include appropriate quantitative or qualitative acceptance criteria for determining that important activities have been satisfactorily accomplished. Contrary to the above, maintenance procedure 27599-C Rev. 2.2,
EDG Fuel Oil Filter and Strainer Maintenance provided inadequate guidance for draining the fuel oil filter prior to replacement. As a result, on May 25 maintenance personnel inadvertently rendered the 1B
EDG inoperable by draining the fuel
header while attempting to replace the east fuel filter. When contacted for assistance a few hours later, engineering and operations personnel recognized this degraded condition and the diesel was declared
inoperable. The licensee documented this event in their corrective action program as CR 460607. This finding was assessed using
IMC 0609, Phase 1 screening worksheet of Attachment 4 and was determined to be of very low safety significance (Green) because the finding did not represent the actual loss of safety function of a single train for greater than its TS allowed outage time.
