ML20042E878
| ML20042E878 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 04/27/1990 |
| From: | VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | |
| Shared Package | |
| ML20042E877 | List: |
| References | |
| NUDOCS 9005030343 | |
| Download: ML20042E878 (5) | |
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REQUEST FOR BMTsueuus op haOATH ANNA UNIT 1 TECHMican spECiFicATICE - BURVElli ANCE TsRT INTERVALB REOUESTED CHANGE
- Currently, Nonh Anna Unit 1 Technical Specifications require the performance of certain surveillance tests at 10 month intervals to coincide with normal 1efueling cycles.
l The proposed change is to extend these surveillance test intervals for the North' Unit 1 eighth cycle by six months to compensate for several unanticipated ou the extended seventh refueling outage that occurred from February 25,1989 15,1989 and to permit optimum fuel bum up prior to refueling.
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SPECIFIC ONE-TIME CHANGES TO THE TECHNICt1 SPECIFICATIONE
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l One time changes to the surveillance test intervals associated with a plant shutdow or refueling outage as specified in the North Anna Unit 1 Technical Specifications for j
Operating License NPF 4 are requested as follows:
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The 10 month surveillance test cycle requirement as specified in the follo Technical Specifications sections is changed to 24 months for the eighth c i
unit operation only:
StGilan Survaillance Requirement t
4.1.2.2.c Verify each volve in boron injection flow path actuates correctly on an Si signal.
4.5.2.e Verify each valve in ECCS subsystem actuates ccrrectly on an Si signal.
4.6.2.1.c Verify each valve and spray purnp in quench spray subsystem actuates correctly on a containment High High signal.
4 4.6.2.2.1.c Verify each valve, casing cooling pump and spray pemp actuates correctly on a containment pressure High-High signal.
4.6.2.3.c i
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j Vettfy each valve in chemical addition system actuates cc:rectly (
on a coraainment pressure High High test signal.
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4.6.3.1.2
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Verify specific containment isolation valves operable during.
rnodo 5 and 6.
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4.7.1.2.b
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Verify each auxiliary feedwater pump and valves estuates l
correctly on auxiliary feedwater actuation test signal.
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w 4.7.4.1.c Verify each Service Water valve servicing safety related equipment actuates correct isolation valve actuates cor$ on Si signal and containerent L rectly on containment High-High '
signal.
4.7.7.14 Verify acceptable pressure drop across HEPA fitter and charcoal absorber, control room normal air supply and exhaust are e
shutdown on Si actuation test signal, and correct control rocm pressure.
n 4.7.8.1 d
. Verify acceptable pressure drop across HEPA filter and charcoal--
l' absorber and correct exhaust flow path on containment High-High testsigna!.
4.8.1.12.d Verify each diesel ger.erator operable during shutdown.
4.8.1.1.3.c Verify each diesel clenerator battery bank and ch'arger operable.
Verify'each DC Bus train brittery bank and charger Mio. -
4.8.2.3.2.c.
Serify each DO Bus train battery cape #4y is adequate.
4.8.2.3.2.d i
2)
Table 1.2 of Section 1.0, Definitionn, which defines "R" as "At least once p months." ss it applies to the following Technical Specifications sections and related tables, and the 18 month requirement in the noto ln the tables indicate
. below, are changed to 24 months fcithe eighth cycle rA unit operation on j
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I Table 4.3-1, Note (4)
Functionally kept reacto't trip system instnamentation manual safety injoction input ffore ESFp i
Table 4.3 2, Note (1)
Verif ESFAS instrumentation channel manual f
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- arAustion' switches are operable.
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DIEURRarul OF REQUERY North Anna Unit 1 completed applicable Mode 4,5, and 6 surveillance seventh refuefhgf outage which ended on July 15,1989. It was considered unreasonable to repeat these curveillance tests during the several short una outages that have. occurred since then. However, these unplanned outages and t unexpected length of the cycle seven refueling outage has impacted the surve test' intervals between the seventh and eighth refuelin
' with additional time allowed for an optimum fuel bum g outa0es. This delay, together up before the next refueling, has resulted in a deferral of the next refueling outage for North Anna Unit i un 1991.
k Specification 4.0.2 is an administrative control which ensures surveillance tests a performed periodically and defines a reasonable period for the tests. The basis of:
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Specification 4.0.2 describes the surveillance requirements as "sufficiently res degraded beyond that obtained from the nominal sp involve an unroviewed safety question as defined in 1 o
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margin of safety provided by the surveillance frequency required in Specification may be slightly reduced by lengthening the time between tems, in our judgeme
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reliability associated with the surveillance will not be significantly degraded b extension of the surveillance test interval. Surveillance tests will conti performed during the extension interve). Current monitoring instrumentation and ongoing Tschnical Specification surveillance tests ensure the affected equipme systems remain in an operable condition.
In addition, the applicable periodic test procedures associated with the last two surveillance intervals have been reviewed and were found to have been completed.
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10 CFR 50.92 Evaluation North Anna Power Station Unit 1 3
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BASIS FOR NO SIGNIFICANT HAZQDS CONSIDERATION The proposed change does not invcive a'significant hazards consideration as defined in 16 CFR 50.92 because the extension of the North Anna Unit 1 operating period in accordance with thic change would not:
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- 1), involve a significant increase in the pabability or consequences of.an accident previously evaluated. -Current monitoring instrumentation and onDoing Technical Specification surve3 lance-tests ensure the -
equipment and systems; involved in the extended surveillance interval a
j will remain in an operable condition until their inspection at the-. next =
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refueling outage.
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Create the possibility of a new or different kind of accident from any accident previously evaluated.
Extending the interval for the s
l performance of specific surveillance tests does not create the possibility of a-new or different kind.of' accident.
Periodic surveillance tests have'been performed since the seventh outage to i
monitor system and component performance and to detect degradation.
Surveillance tests will continue to be performed during the extension interval.
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Involve a significant reduction in the margin of safety.
Extending the interval for these specific surveillance tests for the eighth cycle of' North Anna Unit 1 does-not-significantly degrade the margin of safety.
Surveillance tests will continue to be performed. during theLextension interval.
Current-monitoring instrumentation and ongoing Technical Specification surveillance tests ensare the affected equipment and i
systems remain in an operable condition.
Therefore, it has been concluded that the proposed change does not involve a significant hazards consideration.
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