ML20128B583
| ML20128B583 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 11/25/1992 |
| From: | Labarge D Office of Nuclear Reactor Regulation |
| To: | Medford M TENNESSEE VALLEY AUTHORITY |
| References | |
| TAC-M83543, TAC-M83544, NUDOCS 9212040024 | |
| Download: ML20128B583 (10) | |
Text
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November 25, 1992 Docket Nos. 50-327 and 50-328 Tennessee Valley Authority ATIN:
Dr. Mark 0. Medford, Vice President Nuclear Assurance, Licensing & Fuels 3B Lookout Place 1101 Market Street Chattanooga, Tennessee 37402-2801
Dear Dr. Medford:
S'JBJECT:
ISSUANCE OF BASES CHANGES (TAC NOS. M83543 AND M83544)
(TS 92-05)
The Commission has issued the enclosed Bases changes to Facility Operating License Nos. DPR-77 and DPR-79 for the Sequoyah Nuclear Plant, Units _1 and 2, respectively.
These changes are in response to your application dated May 26, 1992.
Tha changes clarify the terms " hourly" and " continuous" when applied to the requirements for performing fire watch patrols. The approved technical specifications Bases pages affected by the change are attached.
Sincerely.
Original signed by David E. LaBarge, Senior Project Manager Project Directorate 11-4 Division of Reactor Projects - 1/11 Office of Nuclear Reactor Regulation
Enclosures:
1.
Unit 1: Revised TS Bases Pages 2.-
Unit 2 Revised TS Bases Pages cc w/ enclosures:
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1 Tennessee Valley Authority Sequoyah Nuclear Plant ATIN: Dr. Mark 0. Medford cc:
Mr. John B. Waters, Chairman County Judge Tennessee Valley Authority Hamilton County Courthouse ET IPA Chattanooga, Tennessee 37402 400 West Summit Hill Drive Knoxville, Tennessee 37902 Regional Administrator U.S.N.R.C. Region 11 Mr. J. R. Bynum, Vice President 101 Marietta Street, N.W.
Nuclear Operations Suite 2900 3B Lookout Place Atlanta, Georgia 30323 1101 Market Street Chattanooga, Tennessec 37402-2801 Mr. William E. Holland Serior Resident Inspector-Sequoyah Nuclear Plant Mr. M. J. Burzynski, Manager U.S.N.R.C.
Nuclear Licensing and Regulatory Affairs 2600 Igou Ferry Road Tennessee Valley Authority Soddy Daisy, Tennessee 37379 SB Lookout Place Chattanooga, Tennessee 37402-2801 Mr. Jack Wilson, Vice President Sequoyah Nuclear Plant Tennessee Valley Authority P.O. Box 2000 Soddy Daisy. Tennessee 37379 TVA Representative Tennessee Valley Authority 11921 Rockville Pike Suite 402 Rockville, Maryland 20852 Ms. Marci Cooper, Site Licensing Manager Sequoyah Nuclear Plant Tennessee Valley Authority
-P.O. Box 2000 Soddy Daisy, Tennessee 37379 Mr. Michael H. Mobley, Director p
Division of Radiological Health 3rd floor, L and C Annex.
401 Church Street Nashville, Tennessee 37243-1532 General Counsel Tennessee Valley Authority.
ET 11H 400 West Summit Hill Drive Knoxville, Tennessee 37902 1
4 ENCLOSURE 1 TECHNICAL SPECIFfCATION BASES CHANGE FACILITY OPERATING LICENSE NO. DPR-77 DOCKET NO. 50-327 Revise the Appendix A Technical Specifications by removing the pages identified below and inser61ng the enclosed pages.
The revised pages contain marginal lines indicating the area of change.
REMOVE INSERT B3/4 3-4 B3/4 3-4 B3/4 7-8 B3/4 7-8 l
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INSTRUMENTATION BASES 3/4,3.3.8 FIRE DETECTION INSTRUMENTATION OPERABILITY of the fire detection instrumentation ensures that adequate warning capability is available for the prompt detection of fires.
This capability is required in order to detect and locate fires in their early stages.
Prompt detection of fires will reduce the potential for damage to safety related equipment and is an integral element in the overall facility fire protection program.
In the event that a portion of the fire detection instrumentation is inoperable, the establishment of frequent fire patrols in the affected areas is required to provide detection capability until the inoperable instrumentation is restored to OPERABILITY.
All hourly fire watch patrols require that a trained individual be in the specified area at intervals of 60 minutes with a margin of 15 minutes.
3/4.3.3.9 This Specification is deleted.
3/4.3.3.10 EXPLOSIVE GAS HONITORING INSTRUMENTATION This instrumentation includes provisions for monitoring the concentrations of potentially explosive gas mixtures in the waste gas holdup system.
The OPER-ABILITY and use of this instrumentation is consistent with the requirements for monitoring potentially explosive gas mixturet.
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SEQUOYAH --UNIT l' B 3/4 3-4 Amendment No.
43, 148, 149
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PLAN'T SYSTEMS BASES 3/4.7.11 FIRE SUPPRESSION SYSTEMS (Continued)
All hourly fire wat.h patrols require that a trained individual be in the specified area at intervals of 60 minutes with a margin of 15 minutes.
A continuous fire watch requires that a trained individual be in the specified area at.all times, that the specified area contain no impediment to restrict the movements of the continuous fire watch, and that each compartment within the specified area is patrolled at least once every 15 minutes with a margin of 5 minutes.
A specified area for a continuous fire watch is one or more fire zones-within a single fire area, which are easily accessible to each other and can be patrolled within 15 minute.a.
Easy access is defined as:
no locked doors or inoperat,le card reader, no C-Zone entry required, or no hazards that will interfere with the continuous fire watch activity being performed within the 15-minute period.
3/4.7.12 FIRE BARRIER PENETRATIONS The functional integrity of the fire barrier penetrations ensures that fires will be confined or adequately retarded from spreading to adjacent portions of the facility.
fhis design feature minimizes the possibility of a single fire rapidly involving several areas of the facility prior to detection and extinguishment.
The fire barrier penetrations are a passive element in the facility fire protection program and are subject to periodic inspections.
Fire barrier penetrations, including cable penetration barriers, fire doors and dampers are considered functional when the visually observed condi-tion is the same as the as-designed condition.
For those fire barrier penr: rations that are not in the as-designed condition, an evaluation shall be performeu to show that the modification has not degraded the fire rating of the fire t'arrier -
During periods of time when a barrier is not functional, either,1) a continuous fire watch is required to be maintained in the vicinity of the affected barrier, or 2) the fire detectors on at least one side of the affected barrier must be verified OPERABLE and a hourly fire watch patrol established, until the barrier is restored to functional status.
All hourly fire watch patrols require that a trained individual be in the specified area at intervals of 60 minutes with a margin of 15 minutes.
A continuous fire watch requires that a trained individual be in the-specified area at all times, that the specified area contain no impediment to restrict the movements of the continuous fire watch, and that each compartment within the specified araa is patrolled at hast once every 15 minutes with a margin of 5 minutes.
I A specified area for a continuous fire watch is one or more fire zones within a single fire area, which are easily accessible to-each other and can be patrolled within 15 minutes.
Easy access is defined as: _ no locked doors or inoperable card reader, no C-Zone entry required, or no hazards that will interfere with the continuous fire watch activity being performed within'the 15-minute period.
SEQUOYAH - UNIT 1 B 3/4 7-8 Amendment No. 39
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ENCLOSURE 2 TECHNICAL SPECIFICATION BASES CHANGE FACILITY OPERATING LICENSE NO. OPR-79 DOCKET NO. 50-328 Revise the Appendix A Technical Specifications by removing the pages identified below and inserting the enclosed pages.
The revised pager contain marginal lines indicating the area of change.
REMOVE INSERT B3/4 3-4 B3/4 3-4 B3/4 7-7 B3/4 7-7 B3/4 7-8 B3/4 7-8 l
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. INSTRUMENTATION BASES 3/4.3.3.8 FIRE DETECTION INSTRUMENTATION OPERABILITY of the fire detection instrumentation ensures that adequate warning capability is available for the prompt detection of fires.
This capability is required in order to detect and locate fires in their early stages.
Prompt detection of fires will reduce the potential for damage to safety related equipment and is an integral element in the overall facility fire protection program.
In the event that a portion of the fire detection instrumentation is inoperable, the establishment of frequent fire patrols in the affected areas is required to provide detection capability until the inoperable instrumentation is restored to OPERABILITY.
All hourly fire watch patrols require that a trained individual be in the.
specified area at intervals of 60 minutes with a margin of 15 minutes.
3/4.3.3.9 This Specification is deleted.
3/4.3.3.10 EXPLOSIVE GAS MONITORING INSTRbMENTATION This instrumentation includes provisions for monitoring the concentrations of potentially explosive gas mixtures in the waste gas holdup system..The OPERA-BILITY and use of this instrumentation is consistent with the requirements for monitoring potentially explosive gas mixture-.
.E SEQUOYAH - UNIT 2 8 3/4 3-4 Amendment Nos. 35, 46,L134-
PLANT SYSTEMS e
B_A_SE S 3/4.7.11 FIRE SUPPRESSION SYSTEMS The OPERABILITY of the fire suppression systems ensures that adequate fire suppression capability is available to confine and extinquish fires occuring in any portion of tne facility where safety related equipment is located.
The fire suppression system consists of the water system, spray and/or sprinklers, CO,,, and fire hose stations.
The collective capability of the fire suppression tystems is adequate to minimize potential damage to safety related equipment and is a major element in the facility fire protection program.
In the event that portions of the fire suppression systems are inoperable, alternate backup fire fighting equipment is required to be made available in the affected areas until the inoperable equipment is restored to service.
When the inoperable fire fighting equipment is intended for use as a backup means of fire suppression, a longer period of time is allowed to provide an alternate means-of fire fighting than if the inoperable equipment is the primary means of fire suppression.
i l
The surveillance requirements provide assurance that the minimum OPERABILITY requirements of the fire suppression systems are met.
In the event the fire suppression water system becomes inoperable, immediate correctita measures must bt taken since this system provides the major fire suppression capability of the plant.
The requirement 'or a twenty-four hour report to the Commission provides for prompt evaluation of the acceptability of the corrective measures to provide adequate fire suppression capability for the continued protection of the nuclear plant.
All hourly fire. watch patrols require that a trained individual be in the.
specified area at intervals of.60 minutes with a margin of 15 minutes.
A continuous fire watch requires that a trained individual be in the specified area at all times, that the specified area contain no impedir:ent to restrict the movements of the continuous fire watch, and that each compartment within the specified area is patrolled at.least once every 15 minutes with a margin of 5 minutes.
A specified area for a continuous fire watch is.one or more fire zones l
within a single fire area, which are easily accessible to each other and can L
be patrolled within 15 minutes.
Easy access is defined as:
no locked doors
-or inoperable card reader, no C-Zone entry required, or no hr.zards that will interfere with the continuous. fire watch activity being performed within the 15-minute period.
l SEQUOYAH UNIT 2 B 3/4 7-7
' PLANT SYSTEMS BASES 3/4.7.12 FIRE BARRIER PENETRATIONS The functional integrity of the fire barrier penetrations ensures that-fires will be confined or adequately retarded from spreading to adjacent portions of the facility.
This design feature minimizes the possibility of a single fire rapidly involving several areas of the facility prior to detection and extinguishment.
The fire barrier penetrations are a passive element in the facility fire protection program and are suoject to periodic inspections.
Fire barrier penetrations, including cable penetrat'on barriers, fire doors and dampers are considered functional when the visbally observed condi-tion is the same as the as-designed condition, For those fire barrier penetrations that are not in the as-designed condition, an evaluation shall be performed to show that the modification has not degraded the fire rating of the fire barrier penetration.
During periods of time when a barrier is not functional, either, 1) a continuous fire watch is required to be maintained in the vicinity of the affected barrier, or 2) the fire detectors on at least one side of the affected barrier must be verified OPERABLE and a hourly fire watch patrol established.
until the barrier is restored to functional status.
All hourly fire watch patrols require that a trained individual be in the specified area at intervals of 60 minutes with a margin of 15 minutes.
A continuous fire watch requires that a trained individual be in the specified area at all times, that the specified area contain no impediment to restrict th lovements of the continuous fire watch, and that each compartment withfr
, cified area is patrolled at least once every 15 minutes with a marc ae9 nutes.
A-ec'.ied area for a continuous fire watch is one or more fire zones within s single fire area, which are easily accessible to each other_and can be patrolled within 15 minutes.
Easy. access is defined as:
no locked doors or inoperable card reader, no C-Zone entry required, or no hazards that will interfere with the continuous fire watch activity being performed within the 15-minute period.
SEQUOYAH - UNIT 2 B 3/4 7-8
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