ML19344B418
| ML19344B418 | |
| Person / Time | |
|---|---|
| Site: | Farley  |
| Issue date: | 10/13/1980 |
| From: | Clayton F ALABAMA POWER CO. |
| To: | Schwencer A Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8010200590 | |
| Download: ML19344B418 (2) | |
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Director,' Nuclear lReactorRegulationi U. S. ; Nuclear Regulatory Commission-
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Attention:' Mr.-A.1Schwencer 1
q JOSEPH'M.- FARLEY NUCLEAR' PLANT - UNIT ~2 -
~SPECIAL LOW POWER TESTS Gentlemen:
Mr. 0.. G. Eisenhuhs' letter of July-14 1980, requested'that technical
- justification be provided for--any exceptions to the Sequoyah test program.
Information regarding the differences between Farley Nuclear Plant test i
procedures and Sequoyah test procedures for natural circulation with loss of power 1s)provided below'as requested in the above referenced letter and by members of your staff on October 9 1980.
The purpose of Sequoyah Test 2. Loss of Offsit'e Power,Lis' to demonstrate
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that decay heat can be removed via the steam' generators by maintaining steam generator levels with thel auxiliary feedwater system under simulated loss of offsite power conditions. 'The purpose of-Test 7, Loss of ~
Onsite/Offsite Power, is the'same as Test-2 except'that.a loss of all AC power will be simulated and steam generator levels will be maintained,.
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with the turbine driven auxiliary feedwater pump.
Perfoming these tests 4
as3roposed by APC0 would result:in improved safety and enhanced operator-a training. The;following is.a listing ofithe advantages of perfoming these 1.ests as-proposed.:
- 1. :If aaxiliary feedwater valves we're'1 eft open and'auidliary feedwater was' initiated as in:a loss of power event, the injection of'feedwater in. the'. steam generators would cause a rapid drop;in RCS~ temperature and ho--
. pressure. "This is an undesirable condition with a critical reactor
'and would not be of.any benefit in. accomplishing the goal Lof the test.
The auxiliary.feedwater control-valves will be~ shut just prior to s
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stopping (all. reactor coolant pumps and the running main feedwater pump.
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.Then the ' auxiliary feedwater: control: valves will-be throttled to main-.
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itainLsteam generator levels.-
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N 3 NSigni ficantl operatoriattentionTwill E necessary to maintain the w f
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W6 e operator? attention to:diese1) operation;and ailessEcontro11abley 4 q
' $feedwaterisystem iis' not Cnecessaryc to, demonstratetthefobjective: ofi
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.4.1Farley:PreoperationaliTes*.548-6-002, P'lant Response?toKIntegrated., -^
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2 i ~ j$afeguards With Blacliout,> demonstrates"the ability of the-diesel to_
C-tstart.;cometto; rated: speed:andLvoltage aand sequentially load on'
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a l bus undervoltage:and' safety; injection.o Repeating these tests;in the:
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inatural circulation procedurelis:redundantLand 41s not,necessary to -
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imeet;thel purpose ofsthe natura11 circulation 3 est?
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.5'. iFarleyINui: lear-Plant Test ProceduretS00-7-538, Loss:of 0ffsite. Power,
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e (demonstrates that.thelemergency: diesels willistart.and the emergency s ms Ebuses willtsupply power to safety?related equipment toLbring the plant ~
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to_~and maintain hot standby conditions subsequent to-loss of_ norma 11 station. power;at' equa1 to or greaterJthan; ten' percent generator; power.
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- It is not{necessary.to. repeat:thisitest as'a: natural circulttion '
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-pro.ceduretomeetithe(purposeofithenaturalcirculationtest!
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PreoperationallTest5406-002alsoiemon'stratestheabilityofthe' i,
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auxiliary,feedwater? system toJperfors.in the as-designed manner.
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' Repeating-this test. insthe~natura1Jcirc11ation/ procedure would,
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objective?of the natural-circulation ~ test.
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