ML20216C507

Forwards Request for Addl Info Re Utilities Summary Rept Addressing GL 87-02,unresolved Safety Issue A-46. Specifically,Operator Actions Specified in Rept in Order to Make Safety Determination

ML20216C507
Person / Time
Site:	Prairie Island
Issue date:	03/08/1998
From:	Wetzel B NRC (Affiliation Not Assigned)
To:	Richard Anderson NORTHERN STATES POWER CO.
References
REF-GTECI-A-46, REF-GTECI-SC, TASK-A-46, TASK-OR GL-87-02, GL-87-2, TAC-M69474, TAC-M69475, NUDOCS 9803160037
Download: ML20216C507 (3)

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March 8,1998 Mr. Roger O. Anderson, Director Nuclear Energy Engineering l Northern States Power Company 414 Nicolet Mall Minneapolis, Minnesota 55401

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION (RAI) REGARDING THE PRAIRIE ISLAND NUCLEAR GENERATING PLANT UNITS 1 AND 2, VERIFICATION OF SEISMIC ADEQUACY OF MECHANICAL AND ELECTRICAL EQUIPMENT IN OPERATING REACTORS (TAC NOS. M69474 AND M69475) ,

Dear Mr. Anderson:

By letter dated November 20,1995, Northern States Power Company (NSP) submitted its summary report addressing Generic Letter 87-02, " Verification of Seismic Adequacy of Mechanical and Electrical Equipment in Operating Reactors, Unresolved Safety Issue (USP J A-46. The staff is currently reviewing NSP's submittal and requires additional information regarding operator actions specified in the report in order to make a safety determination. Our {

RAI is enclosed. J l

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Please provide your response to the staffs RAI within 60 days of the date of this letter in order l

to support the staffs review schedule. If you have any questions regarding the content of the RAI, please contact me at (301) 415-1355.

Sincerely, 1 ORIGIN %L SIGNED BY Beth A. Wetzel, Senior Project Manager Project Directorate 111-1 Division of Reactor Projects - lil/IV Office of Nuclear Reactor Regulation Docket Nos. 50-282,50-306

Enclosure:

As stated cc w/ encl: See next page i DISTRIBUTION:

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Mr. Roger O. Anderson, Director Prairie Island Nuclear Generating 6-Northern States Power Company Plant hk -

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J. E. Silberg, Esquire Site L! censing Shaw, Pittman, Fotts and Trowbridge Prairie Island Nuclear Generating h 2300 N Street, N. W. Plant Washington DC 20037 Northem States Power Company 1717 Wakonade Drive East Plant Manager Welch, Minnesota 55089 Prairie Island Nuclear Generating Plant Tribal Council

[ Northem States Power Company Prairie Island Indian Community L 1717 Wakonade Drive East ATTN: Environmental Department Welch, Minnesota 55089 5636 Sturgeon Lake Road Welch, Minnesota 55089 Adonis A. Nebiett Assistant Attorney General i

Office of the Attomey General 455 Minnesota Street

( Suite 900 St. Paul, Minnesota 55101-2127 U.S. Nuclear Regulatory Commission Resident inspector's Office 1719 Wakonada Drive East Welch, Minnesota 55089-9642 Regional Administrator, Region lil U.S. Nuclear Regulatory Commission

[ 801 Warrenville Road Lisle, Illinois 60532-4351 Mr.Jeff Cole, Auditor / Treasurer Goodhue County Courthouse Box 408 Red Wing, Minnesota 55066-0408 Kris Sanda, Commissioner Department of Public Service 121 Seventh Place East Suite 200 St. Paul, Minnesota 55101-2145 November 1996

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REQUEST FOR ADDITIONAL INFORMATION

a. Describe what reviews were performed to determine if any local operator actions required to safely shut down the reactor (i.e., implement the SSEL [ safe shutdown equipment list]) cnid be affected by potentially adverse environmental conditions (such as loss of lighting, excessive heat or humidity, or in-plant barriers) resulting from the seismic event. 0escribe how staffing was evaluated and describe the reviews that were conducted to ensure operators had adequate time and resources to respond to such events.

b. As part of the licensee's review, were any control room structures that could impact the operator's ability to respond to the seismic event identified? Such items might include but are not limited to: MCR [ main control room) ceiling tiles, nonbolted cabinets, and nonrestrained pieces of equipment (i.e., computer keyboards, monitors, stands, printers, etc.). Describe how each of these potential sources of interactions has been evaluated and describe the schedule for implementation of the final resolutions.

c. Describe what reviews were performed to determine if any local operator actions were required to reposition " bad actor relays." For any such activities describe how adverse environmental conditions (such as loss of lighting, excessive heat or humidity, or in-plant barriers) resulting from the seismic event were analyzed and dispositioned. Describe how staffing was evaluated and describe the reviews that were conducted to ensure operators had adequa. time and resources to respond to such events,

d. Describe which of the operator actions associated with resetting SSEL equipment affected by postulated relay chatter are considered to be routine and consistent with the skill of the craft. If not considered skill of the craft, what training and operational aids were developed to ensure the operators will perform the actions required to reset affected equipment?

e. Assume the alarms associated with " bad actor relays" are expected to annunciate during the seismic event. Do the operators have to respond to those annunciators and review the annunciator response procedures associated with them for potential action?

How would those additional actions impact the operator's ability to implement the Normal, Abnormal, and Emergency Operating Procedures required to place the reactor in a safe shutdown condition?

f. To the extent that Normal, Abnormal, and Emergency Operating Procedures were modified to provide plant staff with additional guidance on mitigating the A-46 Seismic Event, describe what training was required and provided to the licensed opeT. ors, nonlicensed operators, and other plant staff required to espond to such events.

ENCLOSURE

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