ML071340333
| ML071340333 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley, Davis Besse, Perry |
| Issue date: | 05/14/2007 |
| From: | Carpenter C NRC/OE |
| To: | FirstEnergy Nuclear Operating Co |
| Starkey D | |
| Shared Package | |
| ML071340321 | List: |
| References | |
| EA-07-123, EN-07-028, FOIA/PA-2007-0299 | |
| Download: ML071340333 (7) | |
Text
UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION In the Matter of FIRST ENERGY NUCLEAR OPERATING COMPANY (Davis-Besse Nuclear Power Plant) ) Docket No. 50-346 (Perry Nuclear Power Plant) ) 50-440 (Beaver Valley Nuclear Plant, Units 1 and 2) ) 50-334
) 50-412
)
) License No. NPF-3
) NPF-58
) DPR-66
) NPF-73
)
) EA 07-123 DEMAND FOR INFORMATION I
FirstEnergy Nuclear Operating Company (FENOC or licensee) is the holder of four NRC Facility Operating Licenses issued by the U.S. Nuclear Regulatory Commission (NRC or Commission) pursuant to 10 CFR Part 50, which authorizes the operation of the specifically named facilities in accordance with the conditions specified in each license. License No. NPF-3 was issued on April 22, 1977, to operate the Davis-Besse Nuclear Power Station (Davis-Besse). License No. NPF-58 was issued on November 13, 1986, to operate the Perry Nuclear Power Plant.
Licenses No. DPR-66 and NPF-73 to operate the Beaver Valley Nuclear Plant, Units 1 and 2 were issued on July 2, 1976, and August 14,1987, respectively. The facilities are located on the licensees properties near Toledo and Painesville, Ohio, for the Davis-Besse and Perry Plants, respectively, and near McCandless, Pennsylvania, for the Beaver Valley Nuclear Plant.
2 II On March 8, 2004, the NRC issued a Confirmatory Order to FENOC and approved restart of the Davis-Besse Plant following substantial licensee action to evaluate and develop appropriate corrective actions for the technical and programmatic issues that were associated with the 2002 reactor pressure vessel head degradation event.
On April 21, 2005, the NRC issued a Notice of Violation and Proposed Imposition of Civil Penalties in the amount of 5,450,000 dollars involving violations associated with the 2002 Davis-Besse reactor pressure vessel head degradation event and the root causes for the event.
On September 14, 2005, FENOC responded to the Notice of Violation, paid the proposed civil penalty and addressed each of the violations cited. Its response also addressed FENOCs assessment of the root cause for each violation. On January 23, 2006, FENOC provided a supplemental reply to the Notice of Violation.
FENOC obtained a report from its contractor, Exponent Failure Analysis Associates and Altran Solutions Corporations (Exponent), dated December 2006, prepared in connection with its claim against Nuclear Electric Insurance Limited (NEIL), which included an updated analysis of the timeline and root cause for the 2002 Davis-Besse reactor pressure vessel head degradation event. A significant conclusion of this analysis was a determination by Exponent that the time period between the beginning of substantial leakage from the reactor pressure vessel head nozzle causing the development of the large cavity next to the nozzle may have been as short as 4 months. Previously, FENOC had conducted its own technical and programmatic root cause evaluations of the event and concluded that the reactor pressure vessel head cavity was
3 the result of ongoing nozzle leakage which had gone undetected for more than 4 years.
FENOC also obtained a second report, dated in December 2006, from another contractor, entitled, Report on Reactor Pressure Vessel Wastage at the Davis-Besse Nuclear Power Plant. This second report included conclusions that appeared to be inconsistent with FENOCs previous communications with the NRC and the April 21, 2005, Notice of Violation and Proposed Imposition of Civil Penalties associated with the 2002 Davis-Besse reactor pressure vessel degradation event.
In February 2007, NEIL sent to FENOC a letter identifying what NEIL believed to be potential safety concerns raised by the Exponent report conclusions. Upon receipt of the NEIL letter, the Davis-Besse plant staff generated a condition report in its corrective action program to document the issue.
During March 2007, the NRC held several conference calls with the Davis-Besse staff to obtain additional information regarding the licensees assessment of the concerns raised in the NEIL letter and to understand the licensees planned actions to address the concerns.
By letter dated April 2, 2007, the NRC requested the licensee to respond, in writing, to four questions regarding information and conclusions presented in the Exponent Report to assist the NRC in understanding the assumptions, analysis, and conclusions of the Exponent Report, and to confirm the information provided during the March 2007 conference calls.
By letter dated May 2, 2007, FENOC provided a written response to the NRCs questions. In its response, FENOC stated, among other things, that the Exponent Report set forth an informed analysis that more accurately characterizes the timeline of the reactor head degradation event
4 based upon the use of more recently available test data in conjunction with detailed analytical modeling. FENOCs response did not indicate whether it had completed a comprehensive review of the Exponent Report relative to its previous root cause reports.
The information provided by the licensee regarding the foregoing did not provide the NRC with sufficient information to determine if FENOC had conducted a prompt and thorough review of the Exponent Report. In particular, the NRC needs additional information to determine whether FENOC conducted a timely and comprehensive analysis of the assumptions and conclusions of the Exponent Report to assess their accuracy relative to the technical and programmatic root cause reports previously developed by FENOC and an assessment of whether the NRC should have been notified regarding its conclusions. In addition, FENOC did not provide the NRC with sufficient information to determine if FENOC endorsed the conclusions of the second contractor report and, if so, the effect such positions may have regarding its earlier responses to the April 2005 enforcement actions.
In light of the foregoing, further information is needed for the Commission to determine whether an Order or other action should be taken pursuant to 10 CFR 2.202, to provide reasonable assurance that FENOC will continue to operate its licensed facilities in accordance with the terms of its licenses and the Commissions regulations; in particular, to assure that:
- 1. FENOC demonstrates an appropriate focus, centered on the timely and critical evaluation of information developed internally by FENOC, by its contractors, and by industry sources which may affect safety assessments of its operating nuclear fleet;
5
- 2. FENOC promptly communicates to the NRC all information that it develops, receives, or becomes aware of that has the potential to have a significant impact on public health and safety;
- 3. FENOC has completed a comprehensive assessment of the assumptions and conclusions of the Exponent Report and has determined whether the assumptions and conclusions are consistent with the past operational experience at the Davis-Besse Plant, the assumptions of the previous technical and non-technical root cause reports developed by FENOC as a part of its assessment of the 2002 reactor pressure vessel head degradation event; and the corrective actions developed and implemented by FENOC and relied upon by the NRC as a basis for the restart of the Davis Besse Plant.
- 4. FENOC has completed a comprehensive assessment of the conclusions of its contractors report, entitled, Report on Reactor Pressure Vessel Wastage at the Davis-Besse Nuclear Power Plant, and has determined whether the root cause reports and licensee event reports related to the 2002 reactor pressure vessel head degradation event and the responses to the NRC Notice of Violation and Proposed Imposition of Civil Penalties dated April 21, 2005, should be updated to ensure they are complete and accurate in all material respects.
6 III Accordingly, pursuant to sections 161c, 161o, 182 and 186 of the Atomic Energy Act of 1954, as amended, and the Commission's regulations in 10 CFR 2.204 and 10 CFR 50.54(f), in order to determine whether your licenses should be modified, suspended or revoked, or other action should be taken, the licensee is required to submit to the Director, Office of Enforcement, U.S.
Nuclear Regulatory Commission, Washington, DC 20555-0001, with copies to the Assistant General Counsel for Materials Litigation and Enforcement at the same address, to the Regional Administrator, NRC Region III, 2443 Warrenville, Road, Suite 210, Lisle, IL 60532-4352 and to the Resident Inspectors, within 30 days of the date of this Demand for Information the following information, in writing, and under oath or affirmation:
A. A detailed discussion of the process used, the specific information evaluated, and the conclusions reached as a part of FENOCs assessment of the Exponent Report, upon receipt or subsequently, to determine if the Exponent Report assumptions, analyses, conclusions, or other related information, should have been reported to the NRC in a more prompt manner. Your response shall include sufficient information for the NRC to assess how FENOC evaluated the significant differences between the crack growth and leakage timelines developed in the Exponent Report and previous root cause reports.
B. A detailed discussion of the differences in assumptions, analyses, conclusions, and other related information of the Exponent Report and previous technical and programmatic root cause reports, developed following the 2002 Davis-Besse reactor pressure vessel head degradation event. Your response shall address, among other matters you believe warranted, differences between the operational experience data,
7 such as the origin and presence of boric acid deposits and corrosion products on air coolers, radiation filters, the reactor vessel head, and other components in the containment, and the Exponent Report assumptions for these items. Your response shall also indicate if differences in the Exponent Report assumptions, analyses, information, or conclusions and previous root cause reports demonstrate a need for any new or different corrective actions relative to the 2002 Davis-Besse reactor pressure vessel head degradation event and related issues. Your response shall also address the impact on the continued effectiveness of your corrective actions.
C. With regard to the Report on Reactor Pressure Vessel Wastage at the Davis-Besse Nuclear Power Plant, dated December 2006, indicate if FENOC endorses the reports conclusions. If so, your response shall set forth your assessment of whether this position is in conflict with previous root cause and licensee event reports regarding the 2002 Davis-Besse reactor pressure vessel head degradation event and FENOCs responses to the NRC Notice of Violation and Proposed Imposition of Civil Penalties, dated April 21, 2005. Your response shall also address the impact on the continued effectiveness of your corrective actions.
After reviewing your response, the NRC will determine whether further action is necessary to ensure compliance with regulatory requirements.
FOR THE NUCLEAR REGULATORY COMMISSION
/RA/
Cynthia A. Carpenter, Director Office of Enforcement Dated this 14th day of May 2007