ML18039A268
| ML18039A268 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 03/20/1998 |
| From: | Deagazio A NRC (Affiliation Not Assigned) |
| To: | Zeringue O TENNESSEE VALLEY AUTHORITY |
| References | |
| REF-GTECI-A-46, REF-GTECI-SC, TASK-A-46, TASK-OR BFN-98-005, BFN-98-5, TAC-M69431, TAC-M69432, NUDOCS 9803240361 | |
| Download: ML18039A268 (7) | |
Text
Mr. O. J. Zeringue Chief Nuclear Officer And Executive Vice President Tennessee Valley Authority 6A Lookout Place 1101 Market Street Chattanooga, Tennessee 37402-2801 ch 20, 1998
SUBJECT:
BROWNS FERRY NUCLEAR PLANT, UNITS 2 AND 3: REQUEST FOR ADDITIONALINFORMATIONRELATINGTO THE VERIFICATIONOF SEISMIC ADEQUACYOF MECHANICALAND ELECTRICALEQUIPMENT (TAC NOS. M69431 AND M69432)
Dear Mr. Zeringue:
With a letter dated June 28, 1996, the Tennessee Valley Authority (TVA)submitted seismic evaluation reports summarizing the results of the Unresolved Safety Issue A-46 and Individual Plant Examination of Externally Initiated Events programs for Browns Ferry Nuclear Plant, Units 2 and 3. The staff has completed its review of the Seismic Evaluation Report.
- However, for the staff to make its safety determination additional information is required regarding operator actions specified in the report. The Enclosure identifies the information required.
TVA's responses will require further Nuclear Regulatory Commission review prior to closure of this issue.
Please provide your response by May 1, 1998, ifpossible.
Sincerely, Docket Nos. 50-260, and 50-296 Serial No. BFN-98-005
/s/
Albert W. De Agazio, Senior Project Manager Project Directorate II-3 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation
Enclosure:
Request for Additional Information ccw/encl: See next page N'.
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 2055$ 4001 March 20, 1998 Mr. O. J. Zeringue Chief Nuclear Officer And Executive Vice President Tennessee Valley Authority 6A Lookout Place 1101 Market Street Chattanooga, Tennessee 37402-2801
SUBJECT:
BROWNS FERRY NUCLEAR PLANT, UNITS"2 AND 3: REQUEST FOR ADDITIONALINFORMATIONRELATINGTO THE VERIFICATIONOF SEIS(AIC ADEQUACYOF MECHANICALAND ELECTRICALEQUIPMENT (TAC NOS. M69431 AND M69432)
Dear Mr. Zeringue:
With a letter dated June 28, 1996, the Tennessee Valley Authority (TVA)submitted seismic evaluation reports summarizing the results of the Unresolved Safety Issue A-46 and Individual Plant Examination of Externally Initiated Events programs for Browns Ferry Nuclear Plant, Units 2 and 3. The staff has completed its review of the Seismic Evaluation Report.
- However, for the staff to make its safety determination additional information is required regarding operator actions specified in the report. The Enclosure Identifies the information required.
V/A's responses willrequire further Nuclear Regulatory Commission review prior to closure of this issue.
Please provide your response by May 1, 1998, ifpossible.
Sincerely, Docket Nos. 50-260, and 50-296 Serial No. BFN-98-005 Albert W. De Agazio, Senior P oject Manager Project Directorate II-3 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation
Enclosure:
Request for Additional Information cc w/encl: Sue next page
Mr. O. J. Zeringue Tennessee Valley Authority BROWNS FERRY NUCLEAR PLANT CC:
Mr. J. A. Scalice, Senior Vice President Nuclear Operations Tennessee Valley Authority 6A Lookout Place 1101 Market Street Chattanooga, TN 37402-2801 Mr. Jack-A. Bailey, Vice President Engineering 8 Technical Services Tennessee Valley Authority 6A Lookout Place 1101 Market Street Chattanooga, TN 37402-2801 Mr. C. M. Crane, Site Vice President Browns Ferry Nuclear Plant Tennessee Valley Authority P.O. Box 2000 Decatur, AL 35609 General Counsel Tennessee Valley Authority ET 10H 400 West Summit Hill Drive Knoxville, TN 37902 Mr. Raul R. Baron, General Manager Nuclear Assurance Tennessee Valley Authority 4J Blue Ridge 1101 Market Street Chattanooga, TN 37402-2801 Mr. Karl W. Singer, Plant Manager Browns Ferry Nuclear Plant Tennessee Valley Authority P.O. Box 2000 Decatur, AL 35609 Mr. Mark J. Burzynski, Managar Nuclear Licensing Tennessee Valley Authority 4J Blue Ridge 1101 Market Street Chattanooga, TN 37402-2801 Mr. Timothy E:Abney, Manager Licensing and Industry Affairs Browns Ferry Nuclear Plant Tennessee Valley Authority P.O. Box 2000 Decatur, AL 37402-2801 Regional Administrator, Region II U.S. Nuclear Regulatory Commission 61 Forsyth Street, SW., Suite 23T85 Atlanta, GA 30303-3415 Mr. Leonard D. Wert Senior Resident Inspector U.S. Nuclear Regulatory Commission Browns Ferry Nuclear Plant
, l0833 Shaw Road Athens, AL35611 State Health Officer Alabama Dept. of Public Health 434 Monroe Street Montgomery, AL35130-170I Chairman Limestone County Commission 310 West Washington Street Athens, AL 35611
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BROWNS FERRY NUCLEAR PLANT, UNITS 2 8 3 DOCKET NUMBERS 50-260 and 50-296 REQUEST FOR ADDITIONALINFORMATION REGARDING THE VERIFICATIONOF SEISMIC ADEQUACY OF MECHANICALAND ELECTRICALEQUIPMENT The U.S. Nuclear Regulatory Commission (NRC) staff has completed its review of the Tennessee Valley Authority's (TVA)Seismic Evaluation Report dated June 28, 1996. The staff requires additional information regarding operator actions specified in the report in order to make a safety determination.
A.
Describe what reviews were performed to determine ifany local operator actions, required to safely shutdown the reactor, i.e., implementation of the safe shutdown equipment list (SSEL), could be affected by potentially adverse'environmental conditions such as but not limited to 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 would have adequate time and resources to respond to such events.
As part of the TVA's review, were any control room structures identified which could impact the operator's ability to respond to the seismic event?
Such items might include but are not limited to: main control room ceiling tiles, non-bolted cabinets, and non-restrained pieces of equipment, e.g., computer keyboards, m'onitors, 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 ifany 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 which were conducted to ensure operators would have adequate 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. Ifnot considered skill of the craft, what training and operational aids were developed to ensure the operators willperform the actions required to reset affected equipment?
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 operators'bility 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 operators, non-licensed operators, and other plant staff required to respond to such events.
ENCLOSURE
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