ML19310A589
| ML19310A589 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 06/13/1980 |
| From: | TENNESSEE VALLEY AUTHORITY |
| To: | |
| Shared Package | |
| ML19310A588 | List: |
| References | |
| NUDOCS 8006200326 | |
| Download: ML19310A589 (10) | |
Text
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ENCLOSURE 1 PROPOSED CllA'1GI.S TO SEQUOYAll NUCLEAR PLANT UNIT 1 TECIINICAL SPECIFICATIONS O
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3/4 LIMITING CONDITIONS FOR OPERATION AND SURVEILLANCE REOUIREMENTS 3/4.0 APPLICABILITY LIM' TING CONDITION FOR OPERATION 3.0.1 Limiting Con.ditions for Operation and ACTION requirements shall be applicable during the OPERATIONAL MODES or other cond'tions specified for each specification.
3.0.2 Adherence to the requirements of the Limiting Condition for Operation and/or associated ACTION within the specified time interval shall constitute compliance with the specification.
In the event the Limiting Condition for Operation is restored prior to expiration of the specified time interval, completion of the ACTION statement is not required.
3.0.3 In the event a Limiting Condition for Operation and/or associated ACTION requirements cannot be satisfied because of circumstances in excess of those addressed in the specification, the unit shall be placed in at least HOT STANDBY within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />, in at least H0T SHUTDOWN within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, and in at least COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br /> unless corrective measures are completed that pemit operation under the permissible ACTION statements for the specified time interval as measured from initial discovery or until the reactor is placed in a MODE in which the specification is not applicable.
Exceptions to these requirements shall be stated in the individual specifications.
3.0.4 Entry into an OPERATIONAL MODE or other specified applicability condition shall not be made unless the conditions of the Limiting Condition for Ocaration are met without reliance on provisions contained in the ACTION statements unless otherwise excepted. This provision shall not prevent passage througn OPERATIONAL MODES as required to comply with ACTION statements.
A 3.0.5 When a system, subsystem, train, component or device is detemined to be inoperable soley because its emergency power source is inoperable, or solely because its nomal power source is inoperable, it may be considered OPERABLE for the purpose of satisfying the requirements of its applicable Limiting Condition for Operation, provided:
(1) its corresponding nomal or emergency power source is OPERABLE; and (2) all of its redundant system (s), subsystem (s),
train (s), component (s) and device (s) are OPERABLE, or likewise satisfy the requirements of this specification. Unless both conditions (1) and (2) are satisfied, the unit shall be placed in at least HOT STANDBY within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />, in at least HOT SHUTDOWN within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, and in at least COLD SHUT 90WN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />. This specification is not applicable in MODES 5 or 6?
SEQUOYAH - UNIT 1 3/4 0-1
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APPLICABILITY SURVEILLANCE RE0VIREMENTS 4.0.1-Surveillance Requirements shall be applicable during the OPERATIONAL MODES or other conditions specified for individual Limiting Conditions for Operation unless otherwise stated in an individual Surveillance Requirement.
4.,0. 2 Each Surveillance Requirement shall be performed within the specifiea time interval with:
a.
A maximum allowable extension not to exceed 25% of the surveillance interval, and b.
A total maximum combined interval time for any 3 consecutive surveil-lance intervals not to exceed 3.25 times the specified surveillance interval.
4.0.3 Performance of a Surveillance Requirement within the specified time interval shall constitute compliance with OPERABILITY requirements for a Limiting Condition for Operation and associated ACTION statements unless otherwise required by the specification.
Surveillance Requirements do not have to be performed on inoperable equipment.
4.0.4 Entry into an OPERATIONAL MODE or other specified applicability condition shall not be made unless the Surveillance Requirement (s) associated with the Limiting Condition for Operation have been performed within the specified surveillance interval or as otherwise specified.
4.0.5 Surveillance Requirements for inservice inspection and testing of ASME Code Class 1, 2 and 3 components shall be applicable as follows-i a.
Inservice inspection of ASME Code Class 1, 2 and 3 components and j
inservice testing of ASME Code Class I, 2 and 3 pumps and valves shall be performed in accordance with Section XI cf the ASME Boiler 3
and Pressure Vessel Code and applicable Addenda as required by 10 CFR 50, Section 50.55a(g), except where specific written relief has been granted by the Commission pursuant to 10 CFR 50, Section 50.55a(g)(6)(i).
b.
Surveillance intervals specified in Section XI of the ASME Boiler and Pressure Vessel Code and applicable Addenda for the inservice inspection and testing activities required by the ASME Boiler and Pressure Vessel Code and applicable Addenda shall be applicable as follows in these Technical Specifications:
SEQUOYAH - UNIT 1 3/4 0-2
APPLICABILITY SURVEILLANCE REQUIREMENTS (Continued)
ASME Boiler and Pressure
_ Vessel Code and applicable ^~
Required frequencies Addenda terminology fori for performing inservice inservice inspection and inspection and testing testing activitier activities Weekly At least once per 7 days Monthly At least once per 31 days Quarterly or every 3 months At least once per 92 days Semiannually or every 6 months At least once per 184 days Every 9 months At least once per 276 days Yearly or annually At least once per 366 days c.
The provisions of Specification 4.0.2 are applicable to the above required frequencies for performing inservice inspection and testing
' activities, d.
Performance of the above inservice inspection and testing activities shall be in addition to other specified Surveillance Requirements.
e.
Nothing in the ASME Boiler and Pressure Vessel Code shall be construed to supersede the requirements of any Technical Specification.
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3/4.0 APPLICABILITY BASES
'he specifications of this section provide the general requirements applicable to each of the Limiting Conditions for Operation and Surveillance Requirements within Section 3/4.
3.0.1 This specification defines the applicability of each specification in terms of defined OPERATIONAL MODES or other specified conditions and is provided to delineate specifically when each specification is applicable.
3.0.2 This specification defines those conditions necessary to constitute compliance with the terms of an individual Limiting Condition for Operation and associated ACTION requirement.
3.0.3 This specification delineates the ACTION to be taken for circumstances not directly provided for in the ACTION statements and whose occurrence would violate the intent of the specification.
For example, Specification 3.5.1 requires each Recctor Coolant System accumulator to be OPERABLE and provides explicit ACTION requirements if one accumulator is inoperable. Under the terms of Specification 3.0.3, if more than one accumulator is inoperable, the unit is required to be in
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at least HOT STANDBY within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> and in at least HOT SHUTDOWN within the following 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.
As a further example, Specification 3.6.2.1 requires two Contain:r.ent Spray Systens to be OPERABLE and provides explicit ACTION requirements if one spray system is inoperable: Under the terms of Specification 3.0.3, if both of the required Containment Spray Systems are inopera' ole, the unit is required to be j
in at least HOT STANDBY within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />, in at least HOT SHUTDOUN within the following 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in at least COLD SHUTDOWN in the next 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
It is e
assumed that the unit is brought to the required MODE within the required times by promptly initiating and carrying out the appropriate ACTION statement, 3.0.4 This specification provides that entry into an OPERATIONAL MODE or other specified applicability condition must be made with (a) the full corolenent of required systems, equipment or components OPERABLE and (b) all otner para-meters as specified in the Limiting Conditions for Operation being met witnout regard for allowable deviations and aut of service provisions contained in the ACTION statements.
The intent of this provision is to insure that facility operation is not initiated with either required equipment or systems inoperable er other specified
.imits being exceeded.
SEGUOYAH - UNIT 1 8 3/4 0-1
APPLICABILITY P,ASES Exceptions to this provision have been provided for a limited number of specifications when startup with inoperable equipment would not affect plant safety.
These exceptions are stated in the ACTION statements of the appropriate specifications.
3.0.5 This specification delineates what additional conditions must be satisfied to pemit operation to continue, consistent with the ACTION statements for power sources, when a normal or emergency power source is not OPERABLE.
It specifically prchibits operation when one division is inoperable because its normal or emergency power source is inoperable and a system, subsystem, train, component or device in another division is inoperable for another reason.
The provisions of this specification permit the ACTION statements associated with individual systems, subsystems, trains, components, or devices to be consistent with the ACTION statements of the associated electrical power source.
It allows operation to be governed by the time limits of the ACTION statement associated with the Limiting Condition for Operation for the normal or emergency power source, not the individual ACTION statements for each system, subsystem, train, component or device that is determined to be inoperable solely because of the inoperability of its nomal or emergency power source.
For example, Specification 3.8.1.1 requires in part that two emergency diesel generators be OPERABLE. The ACTION statement provides for a 72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> out-of-service time when one emergency diesel generator is not OPERABLE.
If the definition of OPERABLE were applied without consideration of Specification 3.0.5, all systems, subsystems, trains, components and devices supplied by the inoperable emergency power source would also be inoperable. This would dictate invoking the applicable ACTION statements for each of the applicable Limiting Conditions for Operation.
However, the provisions of Specification 3.0.5 pemit the time limits for continued operation to be consistent with the ACTION statement for the inoperable cmergency diesel generator instead, provided the other specified conditions are satisfied.
In this case, this would mean that the. corresponding nomal power source must be OPERABLE, and all redundant systems, subsystems, trains, components, and devices must be OPERABLE, or otherwise satisfy Specification 3.0.5 (i.e., be capable of performing their design function and have at least one normal or one emergency power source OPERABLE).
If they are not satisfied, shutdown is required in accordance with this specification.
As a further example, Specification 3.8.1.1 requires in part that two phytically independent circuits between the offsite transmission network and the onsite Class IE distribution system be OPERABLE. The ACTION statement provides a 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> out-of-service time when both required offsite circuits are not OPERABLE.
If the definition of OPERABLE were applied without consideration of Specification 3.0.5, all systems, subsystems, trains, components and devices supplied by the inoperable normal power sources, both m the offsite circuits, would also be j
inoperable. This would dictate invoking the applicable ACTION statements for
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SEQUOYAH - UNIT 1 B 3/4 0-2
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APPLICABILITY.
BASES each of the applicable LCOs. However, the provisions of Specification 3.0.5 permit the time limits for continued operation to be consistent with the ACTION statement for the inoperable normal power sources instead, provided the other specified conditions are satisfied.
In this case, this would r.ean that for one division the emergency power source must ce OPERABLE'(as must be the components supplied by the emergency power source) and all redundant systems, subsystems, trains, components -and devices in the other division must be OPERABLE, or likewise satisfy Specification 3.0.5-i.e.
and have an emergency power s(ource, OPERABLE).be capable of performing thei In other words, both emergency power sources must be OPERABLE and all redundant systems, subsystems, trains, components and devices in both divisions must also be OPERABLE, If these conditions are not satisfied, shutdown is required in accordance with this specification.
In MODES 5 or 6 Specification 3.0.5 is not applicable, and thus the individual ACTION statements for each applicable Limiting Condition for Operation in these MODES must be adhered to.
4.0.1 This specification provides that surveillance activities necessary to insure the Limiting Conditions for Operation are met and will be performed during the OPERATIONAL MODES or other conditions for which the Limiting Conditions for Operation are applicable.
Provisions for additional surveillance activities to be performed without regard to the applicable OPERATIONAL MODES or other conditior.: are provided in the individual Surveillance Requirements.
Surveillance Requirements for Special Test Exceptions need only be performed when the Special Test Exception is being utilized as an exception to an individual Specification.
4.0.2 The provisions of this specification provide allowable tolerances for performing surveillance activities beyond those specified in the nominal surveillance interval. These tolerances are necessary to provide operational flexibility because of scheduling and performance considerations. The phrase "at least" associated with a surveillance frequency does not negate this allowable tolerance value and permits the performance of more frequent surveillance activities.
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The tolerance values, taken either individually or consecutively over 3 test intervals, are sufficiently restrictive to ensure that the reliability associated with the surveillance activity is not significantly degraded beyond that obtained from the nominal specified interval.
SEQ 00YAd - UNIT l-B 3/4 0-3
APPLICABILITY BASES 4.0.3 LThe provisions of this specification set forth the criteria for determination of compliance with the OPERABILITY requirements of the Limiting -
Conditions for Operation. Under this criteria, equipment, systems or components are assumed to be OPERABLE if the associated surveillance activities have been satisfactoril performed within the spec'ified time interval.
Nothing in this provision is to be construed as defining equipment, systems or components OPERABLE, when such items are found or known to be inoperable although still meeting the Surveillance Requirements.
4.0.4 This specification ensures that the surveillance activities asso-ciated with a Limiting Condition for Operation have been performed within the specified time interval prior to entry into an OPERATIONAL MODE or other appli-cable condition. The intent of this provision is to ensure that surveillance activities have been satisfactorily demonstrated on a current basis as required to meet.the OPERABILITY requirements of the Limiting Condition for Operation.
Under the terms of this specification, for example, during initial plant startup or following extended plant outages, the applicable surveillance activities must be performed within the stated surveillance interval prior to placing or returning the system or equipment into OPERABLE status.
4.0.5 This specification ensures that inservice inspection 9f ASME Code Class 1, 2 and 3 components and inservice testing of ASME Code Class 1, 2 and 3 pumps and valves will be performed in accordance with a periodically updated version of Section XI of the ASME Boiler and Pressure Vessel Code and Addenda as required by 10 CFR 50.55a.
Relief from any of the above requirements has been provided in writing by the Commission Lad not a part of these technical specifications.
This specification includes a clarification of the frequencies for performing the inservice inspection and testing activities required by Section XI of the ASME Boiler and Pressure Vessel Code and applicable Addenda.
This clarification is provided to ensure consistency _in surveillance intervals throughout these technical specifications and to remove any ambiguties relative to the frequencies for performing the required inservice inspection and testing activities.
Under the terms of this specification, the more restrictive requirements j
of the Technical Specifications take precedence over the ASME Boiler and
)
Pressure Vessel Code and applicable Addenda.
For example, the requirements of Specification ~ 4.0.4 to perform surveillance activities prior to entry into an OPERATIONAL MODE or other specified applicability condition takes precedence over the ASME Boiler and Pressure Vessel Code provision which allows pumps to be tested up to one week af ter return to normal operation.
And for example, the Technical Specification definition of 0PERABLE does not grant a grace period before~a device that is not capable of performing its specificed function is declared inoperable and takes precedence over_ the ASME Boiler and Pressure Vesel Code provision which allows a valve to be incapable of performing its specified function for up to 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> before being declared inoperable.
l SEQUOYAH -' UNIT 1 B 3/4 0-4
ENCLOSURE 2 REASONS AND JUSTIFICATIONS FOR PROPOSED CllANCES TO SEQUOYAll NUCLEAR PLANT UNIT 1 TEClINICAL SPECIFICATIONS 9
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-Specification 3.0.3, Page 3/4 0-1 This change was requested by the NRC in a letter fron D. G.
Eisenhut to All Power Reactor Licensees, dated Aoril 10,.1980.
The purpose of the change is to clarify.the meaning of the term OPERABLE and how it'. applies to the single failure criterion for' safety systens. It is submitted for the convenience of the Comnission.
'2.
Specification 3.0.5, Pace 3/4 0-1 Same as above.
- 3.. Bases 3.0.3, Page B 3/4 0-1 l
Same as above.
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Bases 3.0.5, Pace B 3/4 0-2 l
Same as above.
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