IR 05000423/2005012

IR 05000423-05-012, on 04/20/2005 - 05/18/2005, Millstone Power Station; Unit 3; Special Inspection for April 17, 2005 Event; Event Follow Up

ML051860338
Person / Time
Site:	Millstone
Issue date:	07/05/2005
From:	Blough A Division Reactor Projects I
To:	Christian D Dominion Nuclear Connecticut, Dominion Resources
References
IR-05-012
Download: ML051860338 (51)

Text

uly 5, 2005

SUBJECT:

MILLSTONE POWER STATION UNIT 3 - NRC SPECIAL INSPECTION REPORT 05000423/2005012

Dear Mr. Christian:

On April 29, 2005, the U.S. Nuclear Regulatory Commission (NRC) completed a Special Inspection of the April 17, 2005, inadvertent safety injection actuation and reactor trip at Millstone Power Station, Unit 3. This reactor trip and safety injection actuation was complicated by the subsequent trip of the Unit 3 turbine-driven auxiliary feedwater pump, overfill of the pressurizer, prolonged operation of two main steam safety valves, and significant leakage from the high head injection system. The enclosed report documents the inspection findings which were discussed with Mr. J. Alan Price and other members of your staff on May 18, 2005.

The inspection examined activities conducted under your license as they relate to safety and compliance with Commission rules and regulations and with conditions of your license. The team reviewed selected procedures and records, observed activities, and interviewed personnel. In particular, the inspection team reviewed event evaluations (including technical analyses), root cause investigations, relevant performance history, and extent of condition to assess the significance and potential consequences of issues related to the April 17, 2005 reactor trip. The enclosed Special Inspection Team Charter (Attachment 1) provides additional details on the scope of the inspection.

The team concluded that the overall response of Dominion Nuclear Connecticut (DNC) to the inadvertent safety injection actuation and reactor trip was adequate, in that the plant was taken to a safe shutdown condition. Nonetheless, several issues related to equipment reliability and human performance were identified. The team also noted that existing DNC processes for post-trip event review did not provide clear guidance on the scope and breadth of review necessary to assess complex plant events. The enclosed chronology (Attachment 2) provides additional details on the sequence of events and event complications.

This report documents six findings of very low safety significance (Green). Five of these issues were determined to involve violations of NRC requirements. However, because of their very low safety significance and because they were entered into your corrective action program, the NRC is treating these findings as non-cited violations (NCVs) consistent with Section VI.A of the NRC Enforcement Policy. If you contest any finding or violation in this report, you should provide a response, stating the basis for your denial, within 30 days of the date of this

Mr. David inspection report. Responses should be sent to the Nuclear Regulatory Commission, ATTN:

Document Control Desk, Washington, DC 20555-0001; with copies to the Regional Administrator, Region I; the Director, Office of Enforcement, United States Nuclear Regulatory Commission, Washington, DC 20555-0001; and the NRC Resident Inspector at Millstone.

In accordance with 10 CFR 2.790 of the NRC's "Rules of Practice," a copy of this letter, its enclosures, and your response (if any) will be available electronically for public inspection in the NRC Public Document Room or from the Publicly Available Records (PARS) component of NRCs document system (ADAMS). ADAMS is accessible from the NRC Website at http://www.nrc.gov/reading-rm/adams.html (the Public Electronic Reading Room).

Sincerely,

/RA/

A. Randolph Blough, Director Division of Reactor Safety Docket No: 50-423 License No: NPF-49 Enclosure: NRC Inspection Report 05000423/2005012 cc w/encl:

J. A. Price, Site Vice President, Millstone Station C. L. Funderburk, Director, Nuclear Licensing and Operations Support D. W. Dodson, Supervisor, Station Licensing L. M. Cuoco, Senior Counsel C. Brinkman, Manager, Washington Nuclear Operations J. Roy, Director of Operations, Massachusetts Municipal Wholesale Electric Company First Selectmen, Town of Waterford R. Rubinstein, Waterford Library J. Markowicz, Co-Chair, NEAC E. Woollacott, Co-Chair, NEAC E. Wilds, Director, State of Connecticut SLO Designee J. Buckingham, Department of Public Utility Control G. Proios, Suffolk County Planning Dept.

R. Shadis, New England Coalition Staff G. Winslow, Citizens Regulatory Commission (CRC)

S. Comley, We The People D. Katz, Citizens Awareness Network (CAN)

R. Bassilakis, CAN J. M. Block, Attorney, CAN

Mr. David