B13557, Proposed Tech Specs Revising Surveillance Requirement in Tech Spec 4.0.2 by Deleting Requirement That Combined Time Interval for Any Three Consecutive Surveillance Intervals
| ML20062F355 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 11/09/1990 |
| From: | NORTHEAST NUCLEAR ENERGY CO. |
| To: | |
| Shared Package | |
| ML20062F354 | List: |
| References | |
| B13557, NUDOCS 9011270233 | |
| Download: ML20062F355 (3) | |
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. Attachment 1 J
Millstone Nuclear Power Station, Unit.No. 2'
-l Proposed Revision to Technical Specifications
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APPLICABILITY BASES this would mean that for one division the emergency power source must be 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., be capable of performing their design functions and have an emergency
)ower source OPERABLE).
In other words, both emergency power sources must se OPERABLE and all redundant systems, subsystems, trains, components and devices in both divisions must also be OPERABLE.
If these conditions are not satisfied, action 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 Operat' ion are met and will be performed during the OPERATIONAL MODES or other conditions for which. the Limiting Conditions for Operation are ap)1icable.
Provisions for additional surveillance activities to be performed without regard to the applicable OPERATIONAL MODES or other conditions 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 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 operatin conditions that may not be suitable for conducting the surveillance; e.g.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 pe' formed during refueling outages.
The limitation of Specification 4.0.2 is based on engineering judgment and the recognition that the most probable result of 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 surveillance activities is not significantly degraded beyond that obtained from the specified surveillance interval.
4.0.3 The 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 satisfactorily performed within the specified 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 Surveilla nce Requirements.
MILLSTONE UNIT 2 B 3/4 0-3