ML20113H882

Proposed TS 4.6-2 Re Verification of DG Starts & Acclerations & Voltage & Frequency & Verification of Deenergization of Emergency Buses & Load Shedding from Emergency Buses

ML20113H882
Person / Time
Site:	Prairie Island
Issue date:	08/03/1992
From:	NORTHERN STATES POWER CO.
To:
Shared Package
ML20113H877	List: ML20113H875 ML20113H878 ML20113H882
References
NUDOCS 9208060108
Download: ML20113H882 (4)

Text

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Exhibit B Prairie Island Nuclear Generating Plant Emergency License Amendment Request Dated August 3, 1992 Proposed Changes Marked Up On Existing Technical Specification Pages Exhibit B consists of an existing Technical Specification page with the proposed changes highlighted on that page. The existing page affected by this License Amendment Request is listed below:

TS.4.6-2 P-

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.. TS.4.6-2 REV 91 10/27/S9 4.6.A.2. At-1tcst once each 6 months, for each diesel generator:

a. _ Verify the diesel generator starts and accelerates to at least 900 rpm in less than or equal to 10 seconds,

b. Verify the generator voltage and frequency to be 4160 1 420 volts and 60 i 1.2 Itz within 10 seconds after ':he start signal.

c. Manually synchronize the generator, load to at least 1650 kW in less than or equal to 60 seconds and operate for at least one hour,

d. This test should be conducted in accordance with 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 conjunction with 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-ener6 zation 1 of the emergency buses and load shedding from the emergency buses.3

2. Verify the diesels start on the auto-start signal and energize the emergency buses in one minute. This test should be conduyted in accordance with the manufacturer's recommendations regarding engine prelube and shutdown procedures where possible.

-3. Verify that the auto-connected loads do not exceed 3000 kw.

4. Verify that the diesel generator system trips, except-those for engine overspeed, ground fault, and generator differential current, are automatically bypassed.

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-c. -Verify the capability of each generator to operate at least one hour while loaded to 3000 kw.

d. _ Verify - the _ capability _ of each generator _. to reject a load of at least 650 kw without. tripping.

e '. During this test, operation-of the emergency lighting system shall be ascertained.

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Exhibit C Prairie Island t!uclear Generating Plant Emergency License Amendment Request Dated August 3, 1992 Retised Technical Specification Pages Exhibit C consists of a revised page for the Prairie Island !1uclear Generating Plant Technical Specification with the proposed changes incorporated. The revised page is listed below:

TS.4.6 2 i

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TS.4.6-2 i

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

a. Verify the diesel generator starts and accelerates to at  ;

least 900 rpm in less than or equal to 10 seconds. ,

b. Verify the generator voltage and frequency to be 4160 1 420 volta ana 60 1 1.2 Hz within 10 seconds after the start signal.

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c. Manually synchronize the generator, load to at least 1650 kW in '

less than or equal to 60 seconds and operate for at least one j hour. >

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d. This test should be conducted in accordance with the i manufseturer's recommendations regarding engine prelube and  !

shutdown procedures where possible. '

3. At least once eacti 18 months:

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a. Subject each diesel generator to a thorough inspection in accordance with procedures prepared in conjunction with 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.* l *

2. Verify the diesels atart on the auto start signal and energize the emergency buses in one minute. This test should be conducted in accordance with-the manufacturer's l recommendations regarding engino prelube and shutdown procedures where possible.

3. Verify that the e Eo connected loads do not exceed 3000 kw.

t 4 Verify that the diesel generator system trips, except those for engine overspeed, ground fault, and generator  ?

differential current .are automatically bypassed. *

c. Verify the capability of each generator to operate at least one hour while loaded to 3000 kw.

d. Verify the capability of each generator to reject a load of at leest 650 kw without tripping,

e. During' thin test, operation of the emergency lighting system shall be ascertained.

• Demonstration of the proper tripping of the main supply Sr.d tie breakers on the emergency buses may be dnlayed, on a one time basis. until the Uni and 2 outages scheduled for.the Fall of 1992. ,

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