ML20216D057

Proposed Tech Specs Re Deletion of Requirement to Start Diesel Engine

ML20216D057
Person / Time
Site:	Fort Calhoun
Issue date:	06/22/1987
From:	OMAHA PUBLIC POWER DISTRICT
To:
Shared Package
ML20216D032	List: ML20216D027 ML20216D057
References
TAC-55860, NUDOCS 8706300441
Download: ML20216D057 (10)

Text

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87 6300441 870622

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'2.0 ' LIMITING CONDITIONS FOR OPERATION ;f 2.h Containment Cooling (Continued) .j l

During power' operation one:of the components listed above (in addition j

- -to one rav vater pump) may be inoperable. If the inoperable component: 'j is not restored to' operability within seven days, the reactor shall be placed in a hot -shutdown condition within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />. ~ If the inoper-

..able component is not restored to. operability within an additional i h8 hours, the reactor shall be placed in a cold shutdown condition l

'within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.  ;

i (2) . Modification of Minimum Requirements  ;

i During power operation, the minimum requirements may be modified ' ,

to allov a total of two of the components listed in a. and b. tol

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be inoperable at any one time'(.in addition to'one rav vater pump}. 7 6 penvided that the' -- r;:ney--diesel-generatc( csanected tv the naa" and"aered-safeguare b.16 hY buc (IAh cr-1A3) is started- q t; dcacnetr t: :;: :bility. ' Only two rav vater pumps may.be out of service.- If the operability of both components is not' j rer.tored.vithin 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, the reactor shall be placed in a hot.

shutdown condition within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />. If the operability of both components.is not restored within an additional,h8 hours, the reactor shall be placed in a cold shutdown condition within 24:

hours.

Any valves, interlocks and piping directly a'sso'iated with one

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- of the above components and required.to function during accident -

conditions shall be deemed to be part of that component and shall .l

' meet the same requirements as for that component. -.

2 Any valve, interlock or piping associated with the containmenti

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. cooling rystem which is uct included in the above paragraph and +j vhich is required to function during accident' conditions may be d inoperable for a period of no more than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. If operation j is not restored within 44 hours5.092593e-4 days <br />0.0122 hours <br />7.275132e-5 weeks <br />1.6742e-5 months <br />, the reactor shall be placed in .;

a hot shutdown condition'within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />. i Basis' j l

The requirements of Section 2.3, Emergency Core Cooling. System, apply ]

to the specifications above with respect to the operability of the- 1 I

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'2.0  : LIMITING CONDIT10NS ' FOR OPERATION -

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" 2. 4-- Containment- Cooli'}g, (Continued) component" cooling heat' exchangers and shutdown. heat exchangers.- A. full-

" capacity diesel-generator is connected to each of _ the. two; engineered safeguards 4.16-kV: buses. Three engineered safeguards 480-Volt double -

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b - ' ended load centers are provided; of the six transformers,' three_ are connected to each of the two 4.16-kV buses. Two load centers are

. operated as two-bus-section units; the third;is provided with a center-

,w bus manually transferable to either associated end section.' The center;

. bas ;section supplies HPSI Pump SI-20, CS. Pump SI-3C and Charging Pump-'

CH-10 any of_which can thus be supplied'from either 4.16-kV bus if- ..

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required. Three.ccaponent'coolingheatexchangegshavesufficientt capacity (with ample rese BTU /hr following a'

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i loss-of-coolant accident.g) toThe remove h20 x 10sprays initially take' containment coolant from the safety injection and refueling water (SIRW) t Beforethissupplyofwaterisexhausted.(atleast24 minutes)gL

~ the spray system is transferred to the recirculation mode .and the pumps -

-take' suction"from the containment sump. One shutdown cooling heat ex--

. changer is" sufficient to satisfy the spray system requirements during .

the long-term containment: cooling period.13) In1 addition, in the un-likely event of the component cooling water supply being ;1ost,' raw -

water can be utilized for dire cooling .of the . shutdown heat exchangers l}

and' containment cooling coils.

The containment spray system is redundant'with the containment' air  ;

recirculation, c ng and iodine removal system'for the containmenti d

-*' cooling function. . The spray system is sized such @ two of the 'i three' spray pumps would limit the' containment pressure to below the t air coolers "i design.valuefollowingaDBAwithouttakingcreditfortgi:

or the cooling capacity of. the safety injection system. t Similarly,- 1

' two ; cooling -and filtering units or one cooling- and filtering unit and - .

.both cooling units thehave same.:the' capability of limiting the(egntainment- .,

pressure-under conditions as t,vo spray pumps. 7L j The redundant cooling' equipment.provided to limit the containment- 1 pressure'following a DBA is divided between the independent power _j supply systems. The raw water and component cooling water pumps are- 3 similarly . distributed on the 4.16-kV and 480' Volt buses' to serve the- f above cooling groups. Each cooling group has a design capacity' equal j to that required to restrict the containment pressure to below the- .

design-value. In the' event of a DBA, loss of normal power sources and j F .

- failure of one diesel-generator to operate,. better than one full group would be . connected to the available diesel-generator, thus providing ji more than ample reserve. Any one unit removed from a given bus does. I not restrict the groups which can be connected to one diesel-generator from fulfilling their design function. The removal of two units from buses:which can be connected to one diesel-generator could limit the

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capability of the associated cooling groups; therefore, to ensure availability of the power supply to the redundant equipment in the event ofl loss of normal power. sources, the diesel-generator serving )

this redundant equipment is :;ta. ted " " ---

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3. O SURVEILIANCE REQUIREMENTS . 1

,;  ; .3 7 Emerheney power System periodic Tests b  %  ? Applicability

- Applies to periodic testing and surveillance' requirements of the

emergency power system.

+

.. Objective To verify that the' emergency power system vill respond promptly

~ and properly when required.

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Mpecifications

'Th following tests and surveillance shall be performed as stated:

+L (1) Diesel Generators-

a. . Each diesel engine shall be started once a month and' demonstrated to be ready for loading within 10 second -

i.e. , the diesels shall be tested' alternately at t ek intervals, not both:together). The signal i tiated

'to tart the diesel shall be' varied from one te to ano er .to verify all manual and auto start c cuits.

This at shall cover all local and remote ntrols for both no mal and emergency manual condition .(1) ,

. b. Each dies shall be manually started ormal start) vith all'pr tective' devices operable in preparation

[ for. loading to the bus, once.a' nth. With the diesel running at rat d speed and volt e, the generator shall be: synchronized rith-the k.16

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bus and the diesel breaker manually losed fro the electrical control board. The genera r sha then be loaded to nameplate rating and allowed t r for'15 minutes before being off-loaded and the di el breaker tripped.

c. -Tests shall be e ducted ing each refueling outage to demonstrate he'satisfac ry overall automatic' opera-tion' of eae esel system. lis test shall be initiated  !

by the si. ated simultaneous' ss of h.16'KV supplies ,

.to bus- 3 (1A4) and a simulated uto start signal.  !

Prope operation will be verified observation of (1) de . tergization of bus IA3 (1Ab) and ad shedding from s (both h160 V and h80 V), (2) diesel utomatic start, energization .of bus 1A3 (IA4), automatic quence start of emergency load' and operation for > 5 min es while its generator. is loaded with the. emergency lo s. Manual control of diesel generators and breakers shall 1so be <

verified'during refueling shutdowns,

.d. Each diesel generator shall be given a thorough inspec on at ,.

I ' least annually following the manufacturer's recommendati c

.for this class of. standby service. The above tests vill be s 7 [Ameddment?No.N/ L3-58 ..

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3. 0 ' CURVEILLANCE REQUIREMENTS 37 -Emergency Power System Periodic Tests (Continued)

I considered satisfactory if all applicable equi per-ates as designed. This vill include calib n of moni-l .

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to ng' instrumentation.

e. Diesel generW1ectriodoads shall not be increased

.h, beyond the conti

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ting of 2500 kv.

f. The oil transfer pumps shall ied to be oper-e each month, m

(2) Station Batteries

a. Every month the voltage of each cell (to the nearest 0.01

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volt), the specific gravity, and temperature of a pilot (k) cell in each battery shall be measured and recorded.(3)

b. - Every three months the specific gravity of each cell, the temperature reading of every fifth cell, and the amount of water added shall be measured and recorded. During the first refueling outage and every third refueling outage thereafter the batteries shall be subjected to a rated load discharge test.

c. At monthly intervals the third battery charger, which is

. capable of being connected to either of the two D.C. dis-tribution buses, . shall be paralleled in turn to each D.C. '

bus. In each case, load shall be transferred to this re-serve battery charger by switching out the normal charger.

The reserve charger shall be run on load for 30 minutes on .

each bus and the system shall finally be returned to normal. ,

d. During refueling shutdowns the correct function of all D.C.

emergency transfer switches.shall be demonstrated by manual transfer of normal D.C. supply breakers at the 125 volt D.C.

distribution panels.

(3) Emergency Lighting The correct functioning of the emergency lighting system shall be verified at least once each year.

'(h) 13.8 Kv Transmission Line The 13.8 Ky transmission line vill be energized and loaded to minimum shutdown requirements r.t each refueling outage following installation.

L' 3-59

.AmendmentNo.[ .

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o 63.0 Surveillance Reevirements 3.72 Emergency' Power System' Period Tests LIREPLACE 3.7' SPECIFICATION VITH THE FOLLOWING3 Enacifications ThO following tests and surveillance shall be performed as stated:

h 6 (1)' Diesel'aenerator1:

a. Each. diesel engine shall be started at least once per 31 days on a staggered basis. The engine shall be run with all protective devices operable. The test shall vertly that:

1. The diesel starts and accelerates to rated speed and voltage in less than or equal to 10 seconds.

'Normally,.for the purpose of this surveillance testing, these diesel generator starts may be preceded by an engine prelube period and/or other warm-up procedures recommended by the manufacturer so that mechanical stress and wear on the engine is minimized.

However, at least once per 184 days in these surveillance tests, the 10 second diesel generator start shall be performed from~ ambient conditions (cold start).

The signal initiated to start the diesel shall be varied from .;

.one test to another to verify all manual and auto start circuits.UI

11. With the diesel running at rated speed and voltage, the generator shall be synch:enized with the 4.16 KV bus and the diesel breaker manually closed from the electrical control board. Thegeneratorshall then be loaded to at least the

. continuous KV rating and run for at least 60 minutes before being off-loaded and the diesel breaker tripped.

b. The auto-start initiating circuit for each diesel shall be tented prior to each plant startup if not done during the previous week,

c. Tests shall be conducted during each refueling outage to demonstrate the satisfactory overall automatic operation of each diesel system.

This test'shall be conducted by:

1. Initiation of a simulated auto-start signal to verify that the diesel starts, followed by, I

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11 Initiation of'.a-simulated simultaneous loss of 4,16KV supplies to bus 1A3 (1A4). Proper operation will be' verified by

• observation of:

(1) De-energisation of bus'1A3 (1A4).

(2) Load shedding from bus (both 4160 V and 480 V),

t (3) Energisation of bus 1A3 (1A4).

t (4) Automatic sequence start of emergency. load, and (5) Operation for 1 5 minutes while its generator is loaded with the emergency. loads, 111. Verificationthatemerggncy loads do not' exceed the 2000-HR KV j rating of the engine. i

.d. Manual control of diesel generators and breakers shall also be verified.during refueling shutdowns.

e. Each diesel generator shall be given a thorough inspection on'a refueling (R). frequency in accordance with the manufacturer's

-recommendations for this class of standby service.

f. The fuel oil transfer pumps shall.be verified to be operable each month.

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3. 0 . SURVEILLMICE REQUIREMENTS 3.7 Emergency Power System Periodic Tests'(Continued) L

'(- <

l Basis j 1

j The emergency power system provides power requirements for the en-gineered safety features in the event of a DBA. Each of the two j diesel generators is capable of supplying minimum required safety i feature equipment from independent buses. This redundancy is a facter )

in establishing testing intervals. The monthly tests specified vill demonstrate operability and load capacity of each diesel generator.f '

The fuel supply and various controls are continuously monitored and alarmed for off-normal conditions. At approximately yearly intervals g (during refueling shutdowns) automatic starting on loss of off-site l power and automatic load shedding, diesel connection, and loading vill be verified. At the same intervals, capability will be verified for manual emergency control of these functions from the diesel and' switch-gear rooms. ,

Considering system redundancy, the specified testing intervals for the station batteries should be adequate to detect and correct any malfunction before it can result in system malfunction. Batteries-vill deteriorate with time, but precipitous failure is extremely unlikely. The surveillsnee specified is that which has been de-monstrated over the years to provide an indication of a cell becoming unserviceable long before it fails.

( References

.(1) SAR, Section 7.3.h.2 LL (2) TSAR, Section 8.h.1 LL (3) TSAR, Section 8.3.h Th ese te3n ate _ conduiTecl To meic (b) hSAR,Section8.h.2 4gg g

94 HS r ecj r ch ng th l.s s u t of r eclucM as '

10 ColcI fGSi SicifTs . Fo r di3 re cison .

tk tn:t veI&inc cu t o seco nc\ s ta tt f will be condu&cl 4'ron, con bd nt concMice once per 164 49 h och cDesa .

o ther rn ent h ly resis te n od h a fcc l

'D'l a n Mc\ C i t(1 e r f eco m en o ndcCf M GIIO - M P reduc e, EItu rnecharri c od sf r e.s.s cvnc(. l LV en c o n bius che3 e I eng, n es . {

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l 3-60 l AmendmentNo.g/