ML17279B001

Proposed Tech Specs,Modifying LOCA Response for Diesel Generators,Per Generic Ltr 84-15

ML17279B001
Person / Time
Site:	Columbia
Issue date:	12/15/1987
From:	WASHINGTON PUBLIC POWER SUPPLY SYSTEM
To:
Shared Package
ML17279B000	List: ML17279A999 ML17279B001
References
GL-84-15, TAC-66886, NUDOCS 8804280350
Download: ML17279B001 (4)

Text

ATTACHMENT 1 WNP-2 t i'.ENDMENT NO. 23 February 1982 The size of each of the diesel generators serving Divisions 1 and 2 satisfies the requirements of NRC Regulatory Guide 1.9, Revision 0, and conforms to the following criteria:

a ~ The continuous (8000 hr) nameplate rating of each set exceeds the maximum required load indi-cated in Tables 8.3-1 and 8.3-2.

b. Each diesel generator is capable of starting, accelerating, and supplying its loads in the sequence shown on Tables 8.3-1 and 8.3-2 without exceeding 5 percent frequency drop (maximum).

The units are capable of recovery to 98 percent of normal frequency in less than 2 seconds.

C ~ Each diesel generator is capable of starting, accelerating, and supplying its load in their proper sequence without exceeding 20 percent voltage drop at its terminals (maximum) . The units are capable of recovery to 90 percent of normal voltage is less than 2 seconds.

d. Each diesel generator is capable of starting, accelerating, and running its largest motor at any time after the automatic loading sequence is completed, assuming that the motor had failed to start immediately.

e. Hach diesel generator is capable of reaching full speed and voltage within 10 seconds after receiving a signal to start, and can be fully loaded within 30 seconds following the start signal.

The speed of each diesel generator does not exceed 75 percent of the difference between nomi-nal speed and the overspeed trip setpoint, or 115 percent of nominal speed, whichever is lower, during recovery from transients caused by discon-nection of the largest single load.

Each governor control system includes manual engine idle capability.

Manually operating engines at a reduced speed for "warm up" or a "cool down" run prior to shutdown is recommended by manufacturer to minimize mechanical stress and wear. If a 4.16KV class 1E bus (SM-7,8) primary undervoltage relay signal is recieved when operating engines at reduced RPM (Idle speed), manual control is automatically bypassed. The engines are accelerated to rated speed and generator excitation (field flash) is initiated. The diesel generator is automatically brought to rated fre-

'I I i <'ll quency and voltage attaining a ready-to-load condition"within 40-.-.ooonds:"

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I WNP-2 AMENDMENT HO. 31 June 1983 Voltmeter

b. Ammeter

c. Nattmeter

d. Varmeter-e- Field ammeter f- Annunciator panel

g. Synchroscope, synchronizing switches and lights

h. Frequency meter

i. Elapsed time meter

j. Gen rator breaker status lights

k. Bus-ti breaker status lights The diesel generator s ts are capable of being started or stopped manually from the main control room or from local control panels, and all lass lE instrumentation is capable of being monitor d both in the main control room an9 locally.

r 8 '.1 ~ 1 ~ 8 ~ 1 ~ 11 Light or No Load Operation Light loading of the diesel generators for extended periods may 1 ad to accumulation of oil in th exhaust system and creat a potential for f ire which could damage the turbo-charger and exhaust system. The HPCS or diesel generator (1") wh n started will be load d, but the diesel generators (units 1A and 13) start when offsite power, is not available to the "lass lE 4.16 kV switcngear buses or when LOCA, signal is r ceived. Partial loss of offsite power Qo s not cause connection of a Qies. 1 g nerator onto its 4.15 kV switchgear bus. Once offsite pow r to th bus is reestablishes via transfer to a remaining offsite source, closure of the Diesel generator breaker is blocked. In such a case, the units run unload D. Also, during t sting and maintenance!repairs, periods of unloaded ooeration are also expected to occur.

Zhe Division 1 and 2 diesel generating units are capa'ole of runniny for four (4) hours in the unloaded or lightly loaded

~ondTti on/ Operating restrictions are employed to avoid the potential for firo if the Gi.sels go yn for more than 4 at

-a+<~H~p ~~n hours at 1 ss than 50% loading~. Aeter a hours of loading les.?han 50'4 the engine- are run for .a minimun oi 30 .minutes at great r than 50% loading before being shutdown. /h(~ <2($ ) jn~~

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