IR 05000338/1988001
| ML20235P335 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 02/16/1989 |
| From: | Ernst M NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Cartwright W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| References | |
| NUDOCS 8903020181 | |
| Download: ML20235P335 (27) | |
Text
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FEB 161959
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Virginia' Electric and Power Company ATTN: Mr. W. R. Cartwright, Vice President, Nuclear Operations 5000 Dominion Boulevard Glen Allen, VA 23060
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Gentlemen:
SUBJECT:
ENFORCEMENT CONFERENCE SUMMARY NRC INSPECTION REPORT N05. 50-338,339/88-31 This letter refers to the Enforcement Conference held at our request on January 18, 1989.
This meeting concerned activities authorized for your North Anna facility.
The issues discussed at this conference related to your corrective action on several control room habitability deficiencies identified during an NRC review.
A list of attendees, a summary, and a copy of your handout are enclosed.
We are continuing our review of these issues to deter-mine the appropriate enforcement action.
In accordance with E.790 of the NRC's " Rules of Practice," Part 2, Title 10, Code of Federal Regulations, a copy of thit letter and its enclosures will be placed in the NRC Public Document Room.
Should you have any questions concerning this matter, please contact us.
Sincerely, Original signed by J. Philip Stohr (for)
Malcolm L. Ernst Acting Regional Administrator l
Enclosures:
1.
List of Attendees 2.
Meeting Summary 3.
Handouts
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cc w/encls:
G. E. Kane, Station Manager R. F. Saunders, Manager - Nuclear Programs and Licensing Commonwealth of Virginia bcc w/encls:
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ENCLOSURE 1 l
l ENFORCEMENT CONFERENCE ATTENDEES i
Virginia Electric and Power Company W. Cartwright, Vice President-Nuclear Operations G. Kane, Station Manager R. Saunders, Nuclear Programs and Licensing Manager M. Bowling, Assistant Station Manager J. Hegner, Licensing Supervisor R. Boehling, Project Engineer Nuclear Regulatory Commission, Region II M. Ernst, Acting Regional Administrator, RII
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L. Reyes, Director, Division of Reactor Projects (DRP)
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D. Collins, Acting Director, Division of Radiation Safety and Safeguards (DRSS),RII B. Wilson, Branch Chief, DRP F. Cantrell, Section Chief, DRP P. Fredrickson, Section Chief, DRP l
G. Jenkins, Director, Enforcement and Investigation Coordination Staff
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J. Kahle, Section Chief, DRSS t
L. King, Resident inspector, DRP
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M. Lewis, Project Engineer, DRP l
R. Marston, Reactor Inspector, DRSS B. Uryc, Senior Enforcement Coordinator S. Shaeffer, Project Engineer, DRP Nuclear Regulatory Commission, Headquarters L. Engle, Project Manager, Nuclear Reactor Regulation (NRR)
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ENCLOSURE 2 ENFORCEMENT CONFERENCE SUMMARY An Enforcement Conference was held at the Region 11 Office with Virginia Electric and Power Company (VEPCO) on January 18, 1989, to discuss control room habitability issues at the North Anna Power Station.
The Regional Administrator opened the meeting by expressing the NRC's concerns regarding control room habitability problems and corrective actions taken to date.
The licensee's Vice President of Nuclear Operations then gave a brief discussion about the subject enforcement issues and their understanding of the NRC's concerns in this area.
Also mentioned were some of the corrective actions taken to date.
Subsequent discussions consisted of:
general system design review, including Updated Final Safety Analysis Report (UFSAR) basis and Technical Specification (TS) 3.7.7.1 applicability; control room habitability chronology of events; cause of potential safety concerns; corrective action for both specific and root causes of potential safety concerns and their safety significance.
VEPC0 recognized that potential problems exist with control room habitability due to the marginal design of the air supply systems. They further stated that the habitability systems were designed just to meet the criteria, and their intent is to correct any design deficiencies. During the discussions, the NRC expressed concerns about the timeliness of corrective actions.
VEPC0 responded by commenting on the limited available physical space for modifications, the seismic design constraints, and the fact that both units were operating during the modification process.
Also addressed in detail by both NRC and VEPC0 representatives was the operability of the Bottled Air Pressurization System with respect to control room pressure boundary inleakage.
An inleakage rate of 10 CFM was used to estimate the effect of individual control room door openings which may be necessary during the first hour of an accident.
Bottled air is used for the first hour's ventilation and then suction is switched to the turbine building for the next 31 days.
The NRC questioned the inleakage rate and discussed the possibility of a bottled air test to provide an actual test of the control room's physical configuration.
VEPC0 is considering performance of this test.
VEPC0's position is that the makeup air from the i
bottles is controlled by a pressure control valve and not by flow rate and with the 10 CFM inleakage estimate, the bottled air will maintain the control room at a positive pressure as required by TS 3.7.7.1.
Discussions were also conducted relative to design deficiencies, questionable control of air dampers, and the failure to conduct surveillance in appropriate ways.
One change was noted in the licensee's handout regarding completed corrective l
actions for potential safety concerns.
Revised operating procedures for fuel handling reflects placing the emergency control room ventilation in service during fuel movement and not the control room ventilation as indicated in the presentation handout.
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Enclosure 2
i During the course of the meeting, VEPC0 made the following commitments:
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Submit GDC 19 reanalysis for NRC review, which will include administrative controls.
Add requirement for health physics survey of control room and place in
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procedures.
All engineering modifications are to be completed by the 1990 refueling
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outages with administrative controls in place.
Analyze control room habitability for all modes of operation (other than
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those required by TS).
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Add auto-start for emergency fan in recirculation mode upon receipt of bottled air system actuation.
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Add auto-isolation of normal supply and exhaust on receipt of fuel building high high radiation alarm.
Correct inconsistency between design basis and actual design and operation
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by expanding current Design Basis Documentation Action Plan to include reconciliation with physical configuration and station documents.
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Reevaluate UFSAR assumptions for multiple control room envelope entries.
Revise TS regarding interpretation of the 0.05 inch positive pressure
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requirements for control room envelope during the first hour.
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