ML17188A058
| ML17188A058 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 02/20/1998 |
| From: | Stang J NRC (Affiliation Not Assigned) |
| To: | Kingsley O COMMONWEALTH EDISON CO. |
| References | |
| REF-GTECI-A-46, REF-GTECI-SC, TASK-A-46, TASK-OR TAC-M69442, TAC-M69443, NUDOCS 9803030129 | |
| Download: ML17188A058 (4) | |
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Mr. Oliver D. Kingsley, President Nuclear Generation Group Commonwealth Edison Company Executive Towers West Ill 1400 Opus Place, Suite 500
- Downers Grove, IL 60515 February 20, 1998
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION ON THE RESOLUTION OF UNRESOLVED SAFETY ISSUE A DRESDEN NUCLEAR POWER STATION, UNITS 2 AND 3 (TAC NOS. M69442 AND M69443)
Dear Mr. Kingsley:
By letter dated June 28, 1996, co.TI,rrion~~alth Edison Company (ComEd, the licensee),
provided the plant-specific summary report hi accordance with its commitment relating to Generic t' ~
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Operating* Reactors, USI A-4S,." fc:fr O.resd_er:i Nyclea~ Power' Station, l.Jnits 2 and 3.
- The staff has L-c*_
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reviewed the summary report and det.erpiine~ tha'~ ~'ddi~ional !nformation... ~onc~rr:iing operator I_,,...
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actions is necessary to :~*mplete !he reyiew of the USI A-~6 ~esponse. *We ask that you respond
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to the enclosed request fo'r *additional infotmaticm. wi.thin,96' days~.'::,,
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Docket Nos. 50-237, 50-249
Enclosure:
RAI cc w/encl: See next page.
Distribution:
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PUBLIC
, C. Moore R. Capra ACRS, T2E26 M. Ring,.Riii
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I Orig. sign~d:by:
_., Jo.~n F. Star:ig, Project Manager Project Directorate 111-2 Division of Reactor Projects - Ill/IV Office of Nuclear Reactor Regulation PDlll-2 r/f J. Stang E. Adensam, EGA1 OGC, 015B18 G:\\CMNTSP\\DRESDEN\\DR69443.RAI
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To receive a co OFFICE r **
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~*'r UNITED STATES NUCLEAR REGULATORY COMMISSION Mr. Oliver 0. Kingsley, President Nuclear Generation Group Commonwealth Edison Company Executive Towers West Ill 1400 Opus Place, Suite 500 Downers Grove, IL 60515 WASHINGTON, D.C. 20565-0001 February 20, 1998
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION ON THE RESOLUTION OF.
UNRESOLVED SAFETY ISSUE A DRESDEN NUCLEAR POWER STATION, UNITS 2 AND 3 (TAC NOS. M69442 AND M69443)
Dear Mr. Kingsley:
By letter dated June 28, 1996, Commonwealth Edison Company (ComEd, the licensee),
provided the plant-specific summary report in accordance with its commitment relating* to Generic Letter (GL) 87-02, "Verification of Seismic Adequacy of Mechanical and Electrical Equipment in Operating Reactors, USI A-46," for Dresden Nuclear Power Station, Units 2 and 3. The staff has revi~wed the summary report and determined that additional information concerning operator actions is necessary to complete the review of the USI A-46 response.. We ask that you respond
. to the enclosed request for additional information (RAI) within 90 days.
Docket Nos. 50-237, 50-249
Enclosure:
RAI cc w/encl: See next page Sincerely,
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n F. Stang, Project anager Project Directorate 111-2 Division of Reactor Projects - Ill/IV Office of Nuclear Reactor Regulation
O. Kingsley Commonwealth Edison Company cc:
Michael I. Miller, Esquire Sidley al")d Austin One First National Plaza Chicago, Illinois 60603 Commonwealth Edison Company Site Vice President - Dresden 6500 N. Dresden Road Morris, Illinois 60450-9765 Commonwealth Edison Company Dresden Station Manager 6500 N. Dresden Road Morris, Illinois 60450-9765 U.S. Nuclear Regulatory Commission Dresden Resident Inspectors Office 6500 N.. Dresden Road Morris, Illinois 60450-9766 Regional Administrator U.S. NRC, Region Ill 801 Warrenville Road Lisle, Illinois 60532-4351 Illinois Department of Nuclear Safety Office of Nuclear Facility Safety 1035 Outer Park Drive Springfield, Illinois 62704 Chairman Grundy County Board Administration Building 1320 Union Street Morris, Illinois 60450 Document Control Desk-,Licensing Commonwealth Edison Company 1400 Opus Place, Suite 400 Downers Grove, Illinois 60515 Mr. David Helwig Senior Vice President Commonwealth Edison Company Executive Towers West Ill 1400 Opus Place, Suite 900 Downers Grove, IL 60515.
Dresden Nuclear Power Station Units 2 and 3 Mr. Gerie H. Stanley
. PWR's Vice President Commonwealth Edison Company Executive Towers West Ill 1400 Opus Place, Suite 900 Downers Grove, IL 60515.
Mr. Steve Perry BWR's Vice President Commonwealth Edison Company Executive Towers West Ill 1400 Opus Place, Suite 900 Downers Grove, IL 60515 Mr. Dennis Farrar Regulatory Services Manager Commonwealth Edison Company Executive Towers West Ill 1400 Opus Place, Suite 500 Downers Grove, IL 60515 Ms. Irene Johnson, Licensing Director Nuclear Regulatory Services Commonwealth Edison Company Executive Towers West Ill 1400 Opus Place, Suite 500 Downers Grove, IL 60515 Commonwealth Edison Company Reg. Assurance Supervisor-Dresden 6500 N. Dresden Road Morris, Illinois 60450-9765 Mr. Michael J. Wallace Senior Vice President Commonwealth Edison Company Executive Towers West Ill 1400 Opus Place, Suite 900 Downers Grove, IL 60515
REQUEST FOR ADDITIONAL INFORMATION DRESDEN NUCLEAR POWER STATION. UNITS 2 AND 3
. UNRESOLVED SAFETY ISSUE A-46
Reference:
Letter from Commonwealth Edison Company to NRC with a Summary Report.and Attachments, dated June 28, 1996 The staff requires additional information regarding operator actions specified in the report in order to make a safety determination.
- 1.
Describe what reviews were performed to determine if any local operator actions required to safely shutdown the reactor (i.e., implement the SSEL) could 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. Describe how staffing was evaluated and describe the reviews which were conducted to ensure operators had adequate time and resources to respond ~o such events.
- 2.
As part of the licensee's review, were any control room structures which could impact the operator's ability to respond to the seismic event identified? Such items might include but are not limited to: MCR ceiling tiles, non-bolted cabinets,. and non-restrained 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.
- 3.
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, exeessive 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 which were conducted to ensure.
operators had adequate time and resources to respond to such events..
- 4.
Describe which of the operator actions associated with resetting SSE.L equipment affected by po~tulated 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?
- 5.
Assume the alarms associated with
- bad acior 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 operators ability to implement the Normal,
-Abnormal, and Emergency Operating Procedures required to place the reactor in a safe shutdown condition?
- 6.
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 operators, non-licensed operators, and other plant staff required to respond to such events.
ENCLOSURE
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