ML11223A211
| ML11223A211 | |
| Person / Time | |
|---|---|
| Site: | Prairie Island  |
| Issue date: | 08/11/2011 |
| From: | Nick Hilton NRC/OE |
| To: | |
| Coleman N | |
| References | |
| EA-11-110 EN-11-028 | |
| Download: ML11223A211 (2) | |
Text
August 11, 2011 EN 11-028 OFFICE OF ENFORCEMENT NOTIFICATION OF SIGNIFICANT ENFORCEMENT ACTION Licensee: Northern States Power Company EA-11-110 Prairie Island Nuclear Generating Plant Docket No. 50-282
Subject:
ISSUANCE OF FINAL SIGNIFICANCE DETERMINATION AND NOTICE OF VIOLATION This is to inform the Commission that a Notice of Violation will be issued on or about August 17, 2011, to Northern States Power Company as a result of an inspection at Prairie Island Nuclear Generating Plant. The enforcement action consists of a White finding associated with a violation of Technical Specification 3.8.4.
The White finding, an issue with low to moderate safety significance, along with a violation, involved the licensees failure to maintain the direct current electrical power subsystems operable in Modes 1 through 4. Specifically, from December 21, 1994 to approximately October 22, 2010, all battery chargers in Unit 1 were susceptible to a common mode failure under design basis accident conditions. Under those conditions, the battery chargers would stop providing an output, or lock-up, when their alternating current input voltage dropped below their nameplate minimum voltage at the battery charger motor control center.
It should be noted that the licensee has not been specifically informed of the enforcement action.
The schedule of issuance and notification is:
Mailing of Final Significance Determination August 17, 2011 Telephone Notification of Licensee August 17, 2011 The State of Minnesota will be notified.
CONTACTS: Nicole Coleman, OE, (301) 415-1048 Nick Hilton, OE, (301) 415-3055
2 Distribution: EN-11-028, August 11, 2011 OWFN OWFN TWFN EBB Regional Offices Chairman Jaczko EDO OCFO NMSS RI RII Comm. Svinicki DEDR OP CENTER RIII RIV Comm. Apostolakis DEDMRS FSME Comm. Magwood OE OIG MAIL Comm. Ostendorff OGC OCIO ADAMS SECY NRR RES OE staff OCA NSIR ACRS PA OI IP Electronic DISTRIBUTION:
R. Zimmerman, OE A. Campbell, OE N. Hilton, OE N. Coleman, OE OE r/f EN binder X PUBLIC X NON-SENSITIVE ADAMS ML11223A211 OFFICE OE:ES OE:BC NAME N. Coleman N. Hilton DATE 8/11/2011 8/11/2011 OFFICIAL RECORD COPY