ML20072U394
| ML20072U394 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 04/12/1991 |
| From: | NORTHEAST NUCLEAR ENERGY CO. |
| To: | |
| Shared Package | |
| ML20072U387 | List: |
| References | |
| NUDOCS 9104190124 | |
| Download: ML20072U394 (4) | |
Text
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1 Docket No. 50-336 B13801 i
i Millstone Nuclear Power Station, Unit No. 2 Technical Specification Pages for Amendment Dated November 9,1990 April 1991 9104190124 91ou 2 ADOCK0500g6 DR
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aEELICABILITY LIMITING CONDITION FOR OPERATION (Continued) 1.
At least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.
2.
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 />, and 3.
At least COLD SHUTDOWN within the subsequent 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
This specification is not applicable in MODES 5 or 6.
4 SVRVEILLANCE 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 specified time interval with a maximum allowable extension not to exceed 25%
of the surveillance time interval.
4.0.3 Failure to perform a Surveillance Requirement within the allowed surveillance interval, defined by Specification 4.0.2, shall constitute a failure to meet the OPERABILITY requirements for a Limiting Condition for Operation.
The time limits of the ACTION requirements are applicable at the time it is identified that a Surveillance Requirement has not been performed.
The ACTION requirements may be delayed for up to 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> to permit the completion of the surveillance when the allowable outage time limits of the ACTION requirements are less than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
Surveillance Requirements do not have to be performed on inoperable equipment.
4.0.4 Entry into an OPERATIONAL MODE or other specified condition shall not be made unless the Surveillance Requirement (s) associated with the Limiting Condition for Operation have been performed within the stated surveillance interval or as otherwise specified.
This provision shall not prevent passage through or to OPERATIONAL MODES as required to comply with ACTION requirements.
4.0.5 Surveillance Requirements for inservice inspection and testing of ASME Code Class 1, 2 and 3 components shall be applicable as follows:
a.
Inservice inspection of ASME Code Class 1, 2 and 3 components and inservice testing ASME Code Class 1, 2, and 3 pumps and valves shall be performed in accordance with Section XI of the ASME Boiler 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)(1).
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BASES (Con't) be consistent with the ACTION statement for the inoperable normal power sourcos instead, provided the other specified conditions are satisfied.
In casa, this would r.iean that for one division the emergency power source must be OPCRABLE (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., be capable of performing their design functions and have an emergency power source OPERABLE).
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 satis-fied, action is required in accordance with this specification.
In MODES S and 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.
Enecification 4.0.1 throuah 4.0.5 establish the general requirements applic-able to Surveillance Requirements.
These requirements are based on the Surveillance Requirements stated in the Code of Federal Regulations, 10CfR50.36(c)(3):
" Surveillance requirements are requirements relating to test, cali-bration, or inspection to ensure that the necessary quality of systams and components is maintained, that facility operation will be within safety limits, and that the limiting conditions of operation will be met."
Epocification 4.0.1 establishes the requirement that surveillances must be performed during the OPERATIONAL MODES or other conditions for which the requirements of the Limiting Conditions for Operation apply unless otherwise stated in an individual Surveillance Requirements.
The purpose of this specification is to ensure that surveillances are aerformed to verify the operational status of systems and components and tlat parameters are within specified iin,its to ensure safe operation of the facility when the plant is in a MODE or other specified condition for which the associated Limiting Conditions for Operation are applicable.
Surveillance Requirements do not have to be performed when the facility is in an OPERATIONAL MODE for which the requirements of the associated Limiting Condition for Operation do not ap)1y unless otherwise specified.
The Surveillance Requirements associated wit 1 a Special Test Exception are only applicable when the Special Test Exception is used as an allowable exception to the requirements of a specification.
Specification 4.0.2 This specification establishes the limit for which the specified time interval for Surveillance Requirements may be extended.
It permits an allowable extension of the normal surveillance interval to facilitate surveillance scheduling and consideration of plant operating conditions that may not be suitable for conducting the surveillance; e.g.,
transient conditions or other ongoing surveillance or maintenance activities, it also provides flexibility to accommodate the length of a fuel cycle for surveillances that are performed at each refueling outage and are specified with an 18 month surveillance interval, it is not intended that this provision be used repeatedly as a convenience to extend surveillance intervals beyond that specified for surveillances that are not performed during refueling outages.
The limitation of Specification 4.0.2 is based on engineering judgment and the recognition that the most probable result of l
any particular surveillance being performed is the verification of conformance with the Surveillance Requirements. This provision is sufficient to ensure that the reliability ensured through l
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- 4 3/4.0 APPLICABILITY BASES (Conit) surveillance activities is not significantly degraded beyond that obtained from the specified surveillance interval.
Specification 4;0.3 establishes the failure to perform a Surveillance Require +
ment within the allowed surveillance interval, defined by the provisions of Specification 4.0.7, as a condition that constitutes a failure to meet the OPERABILITY requirements for a Limiting Condition for Operation. Under the provisions of this specification, systems and components are assumed to be OPERABLE when Surveillance Requirements have beenl satisfactorily performed within the specified time interval.
However, nothing in this provision is to be construed as im)1ying that systems or components are OPERABLE when they are found or known to se inoperable although still meeting the Surveillance Requirements. 'This specification also clarifies that the ACTION requirements are applicable when Surveillance Requirements have not been com)1eted within the allowed surveillance interval and that the time limits of t1e ACTION requirements apply from-the point in time it is identified that a surveillance has not been performed and not at the time that the allowed surveillance interval was exceeded. Completion of the Surveillance Requirement within the allowable outage time limits of the ACTION requirements restores compliance with the requirements of Specification 4.0.3.
However, this does not negate the fact that the failure to have performed the surveillance within the allowed surveillance interval, defined by the provisions of Specification 4.0.2, was a violation of the OPERABILITY requirements of a Limiting Condition
=for Operation..
if the allowable outage time 1_imits of the ACTION requirements are less than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> or a shutdown is required to comply with ACTION requirements, e.g., Specification 3.0.3, a 24-nour allowance is provided to permit a delay in implementing the ACTION requirements. This provides an adequate time _ limit to complete Surveillance Requirements that have not been performed.
The purpose of this allowance is to permit the completion of a surveillance before a snutdown is required to comply with ACTION requirements or before other remedial. measures would be required that may preclude completion of a surveil-lance. The basis for-this allowance includes consideration for plant condi-tions, adequate planning, availability of personnel, the time required to perform the surveillance,.'and the safety significance of the delay in complet-ing the required surveillance - If a surveillance is not completed within the' 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> allowance, the-time limits of the ACTION requirements are applicable at;that time. When a surveillance is performed within the 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> allowance and the Surveillance Requirements are not met, the time limits of the ACTION requirements-are applicable at the time that the surveillance is terminated.
' Surveillance Requirements do not have to be performed on-inoperable equipment because the ACTION requirements define the-remedial. measures that apply. _
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-However, the Surveillance Requirements have to be met to demonstrate that inoperable equipment has been restored to OPERABLE status.
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