ML20073K492

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Proposed Tech Specs 4.6-1 & 4.6-2 Re Emergency Diesel Generator Testing Requirments
ML20073K492
Person / Time
Site: Prairie Island  Xcel Energy icon.png
Issue date: 10/03/1994
From:
NORTHERN STATES POWER CO.
To:
Shared Package
ML20073K479 List:
References
NUDOCS 9410110256
Download: ML20073K492 (7)
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Exhibit B Prairie Island Nuclear Generating Plant 1

License Amendment Request Dated October 3, 1994 l Proposed Changes Marked up on Existing Technical Specification Pages Exhibit B consists of existing Technical Specifications pages with the proposed changes highlighted on those pages; the backgrounded text represents the proposed additions and the lined-out text represents the proposed deletions. The existing pages affected by this License Amendment Request are listed below:

Pares TS.4.6-1

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TS.4.6-2 l

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l 9410110256

'DR 941003 ADOCK 05000282 PDR

f TS.4.6-1 4.6 PERIODIC TESTING OF EMERGENCY POWER SYSTEM Applicability Applies to periodic testing and surveillance requirements of the emergency power system.

Obiective To verify that the emergency power sources and equipment are OPERABLE.

Specification The following tests and surveillance shall be performed:

A. Diesel Generators

1. At least once each month, for each diesel generator:
a. Verify the fuel level in the day tank. ,
b. Verify the fuel level in the fuel storage tank,
c. Verify that a sample of diesel fuel from the fuel storage tank is within the acceptable limits specified in Table 1 of ASTM D975-77 when checked for viscosity, water, and sediment.
d. Verify the fuel transfer pump can be started and transfers fuel fro.n the storage system to the day tank.
e. Verify the diesel generator can start and gradually accelertte-to synchrencue epcedji3sr.ifylthy w444*-generator voltage end frequency pau be" a'dj us ted ]t'o]at-4160 420 volts and 60 1.2 Hz. Sul aquently, manually synchronize the generator, gradually load to n 'ast 1650 kW (Unit 2: 5100 kW to 5300 KW), and operate for at leasr f4 minutes.

This test should be conducted in 'consi;dehtlofofjaosordanec .zith the manufacturer's recommendations regarding engine prelube, warm-up, loading and shutdown procedures where possible.

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. TS.6.6-2 4.6.A.2. At least once each 6 months, for each diesel generator:

a. Verify the diesel generator starts andfayh(byss 2ccelernter te 2t 1ccet synchreneur cpced in lecc than er equal te 10 cecendc.
b. 'Jerify-the generator voltage and frequency te be bfj4160 i 420 volts and 60 1.2 Hz within 10 seconds after the start signal.

be. Manually synchronize the generator, load to at least 1650 kW (Unit 2: 5100 kW to 5300 kW) in less than or equal to 60 seconds and operate for at least one hour.

sd. This test should be conducted fr6m?sta.ndb

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Of[2 cerdance zith-the manufacturer's recommendations regarding engine prelube and shutdown procedures where possible.

3. At least once each 18 months:
a. Subject each diesel generator to a thorough inspection in r

accordance with procedures prepared in bdnslidspationibf{cenjunctier uith the manufacturer's recommendations for this class of standby service,

b. For each unit, simulate a loss of offsite power in conjunction with a safety injection signal, and:
1. Verify de-energization of the emergency buses and load shedding from the emergency buses.
2. Verify the diesels start on the auto start signal and energize the emergency buses in one minute. This test should be conducted in h6nsidetation#0ff accordance 21th the manufacturer's recommendations regaEding engine prelube and shutdown procedures where possible.
3. "crify thnt the cute-cennected Icede de net eneced 3000 kw,-

(Unit 2: 5100 u!).

^ "^ r i fy tha t the diccel generater cystem-t-r4pc , encept there fer engine evercpced, ground fault, 2nd generater different4al-ourrent (Unit 2: encept thecc fer engine evercpced nr.d gerar2ter differc :tici curre :t), 2rc cuter 2tien11y bypcceed,

3. Duringithis { t e a t { ope;r s tion j fithelem e rge ncjlli ghtindfs tieQhill be ascertained) .
c. For each diescl{jsnsritojun44, demonstrate full-load carrying capability for an interval of not less than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, of which sj leastl2 hours are at shfindidat edle-load equal to W5-1031to 110 percent of the continuous rating of the emergency diesel generator, and 33theiremaindsr 6f 7t hs"24' hours are at EntiHdiEitEd%-load 6f

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Steaterftluingorfegual Eo'9g50 te 100 percent of iEs continuous j rating. Verify the generator voltage and frequency to be 4160 420 volts and 601 1.2 Hz.'jMomEntsry[transientsTontside{ thel 16ad@anges do"not2invalidateithis..testf I

TS.4.6-2 (continued)

d. Verify the capability of each generator to reject a load of at least 650 kW (Unit 2: 860 kW) without tripping.
e. During thic tect, eperatien of the :crgency lighting cycter ch:11 be 2 r c e r t a4++ed, ,

e'. " For'. each : UnitWaimulate"[a;;;Yafety ?ihj setio.rit"s. ighdli. .ahd V,..sti...f'y::fthst?'ths; diesel. .. generator systemitrip.x.,s ; c except .:tho.. .. ; ,..,;.. . se:

fo. .,; -r;;

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eng' i.<; .., . c :nef.o' y' e rspe'e' :d']g~ v' '" ^

ground: faultf:. and generator! differential [cufre'nti((Utilt-(2:4iexcspc tho se . fo r.; engine (ove rspe nd3 nd]. gene ratoi[diffeVent ialicjarr e.nt).Qis automatically. bypassed!

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(:-- 1 Exhibit C Prairie Island Nuclear Generating Plant License Amendment Request Dated October 3, 1994 Revised Technical Specifications Pages Exhibit C consists of revised pages for the Prairie Island Nuclear Generating Plant Technical Specifications with the proposed changes incorporated. The revised pages are listed below:

Pares TS.4.6-1 TS.4.6-2 4

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. TS.4.6-1 f

4.6 PERIODIC TESTING OF EMERCENCY POWER SYSTEM Applicability Applies to periodic testing and surveillance requirements of the emergency ,

power system.

Obiective To verify that the emergency power sources and equipment are OPERABLE.

Specification The following tests and surveillance shall be performed:

A. Diesel Generi. tors

1. At least once each month, for each diesel generator:
a. Verify the fuel level in the day tank.
b. Verify the fuel level in the fuel storage tank.
c. Verify that a sample of diesel fuel from the fuel storage tank is within the acceptable limits specified in Table 1 of ASTM D975-77 when checked for viscosity, water, and sediment.
d. Verify the fuel transfer pump can be started and transfers fuel from I

the storage system to the day tank.

e. Verify the diesel generator can start and gradually accelerate. Verify the generator voltage and frequency can be adjusted to 4160 1 420 volts and 601 1.2 liz. Subsequently, manually synchronize the generator, gradually load to at least 1650 kW (Unit 2: 5100 kW to 5300 KW), and operate for at least 60 minutes This test should be conducted in i consideration of the manufacturer's recommendations regarding engine l l prelube, warm-up, loading and shutdown procedures where possible. l 1

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. TS.4.6-2 '

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4.6.A.2. At least once each 6_ months, for each diesel generator:

a. Verify the diesel generator starts and achieves generator voltage and ,

frequency of 4160 i 420 volts and 60 1.2 Hz within 10 seconds after  !

the start signal.

b. Manually synchronize the generator, load to at least 1650 kW (Unit l 2: 5100 kW to 5300 kW) in less than or equal to 60 seconds and  ;

operate for at least one hour.  !

c. This test should be conducted from standby conditions in consideration of the manufacturer's recommendations regarding engine prelube and shutdown procedures where possible.
3. At least once each 18 months:
a. Subject each diesel generator to a thorough inspection in accordance with procedures prepared in consideration of the l manufacturer's recommendations for this class of standby service,
b. For each unit, simulate a loss of offsite power in conjunction with a safety injection signal, and: l
1. Verify de-energization of the emergency buses and load shedding from the emergency buses.
2. Verify the diesels start on the auto-start signal and energizo the emergency buses in one minute. This test should be conducted in consideration of the manufacturer's recommendations  !

regarding engine prelube and shutdown procedures where possible.

3. During this test, operation of the emergency lighting system shall be ascertained,
c. For each diesel generator, demonstrate full-load carrying capability for an interval of not less than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, of which at least 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> are at an indicated load equal to 103 to 110 percent of the continuous rating of the emergency diesel generator, and the remainder of the 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> are at an indicated load of greater than or equal to 92 percent of its continuous rating. Verify the generator voltage and frequency to be 4160 1 420 volts and 60 1 1.2 Hz. Momentary transienes outside the load ranges do not invalidate this test.  ;
d. Verify the capability of each generator to reject a load of at least 650 kW (Unit 2: 860 kW) without tripping.
e. For each unit, simulate a safety injection signal and verify that the l diesel generator system trips, except those for engine overspeed, ground fault, and generator differential current (Unit 2: except those for engine overspeed and generator differential current), are automatically bypassed.

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