Text

Proposed Tech Specs Re Reduction of Min Fuel Oil Vol Required During Modes 5 & 6 for Operable EDGs
	ML20082U843
Person / Time
Site:	Comanche Peak
Issue date:	05/01/1995
From:	; TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:	;
Shared Package
ML20082U833	List: ML20082U843; TXX-9509, Application for Amends to Licenses NPF-87 & NPF-89.Amends Would Reduce Min Fuel Oil Vol Requirement During Modes 5 & 6 for Operable EDGs;
References
	NUDOCS 9505080029
	Download: ML20082U843 (21)
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ATTACHMENT 3 TO TXX 95090 AFFECTED TECHNICAL SPECIFICATION PAGES .i (NUREG 1468) .

(pages 3/4 8 1, 3/4 8 3, 3/4 8 10, B 3/4 8 1 and B 3/4 8 2) i

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9505080029 950501 !

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1 3/4.s ELECTRIC /1 POWER SYSTEMS 3/4.3.1 A.C. sM effs 0PERATING I

LINITING CONDITION FOR OPERATION p

h. E 3.8.1.1 Asaminimum,thefollowingh.__ _ _ _ dd[

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shall be

j ff a. Two physically independent circuits between the offsite transmission network and the onsite Class IE Otstribution Systes, &

r 8- b. Two separate and independent diesel generators, each with:

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1) A separate day fuel tank ontaining e minimum volume of 3 J 1440 gallons of fuel, s.nd g _

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) A separate fuel transfer p f hg k APPLICAaltlTY: MODES 1, 2, 3, and 4.

f ACTION: .

L t-7 72 g a. With one offsite circuit of the above-required A.C. electricci power

- i 1

L sources inoperable, demonstrats the OPERASILITY of the remaining A.C.

T <$o sources by performing Surveillance Requirement 4.8.1.1.la. within I hour and at least once per 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months thereafter. If either diesel h generator has not been successfully tested within the past 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months , a demonstrate its OPERA 81LITY by performing Survet11ance Requirement 4.8.1.1.24.4) for each such diesel generator, separately, within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .' Restore the offsite circuit to OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months or be in at least HDT STA28Y within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN wtthin the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

b. With either diesel generator inoperable, demonstrate the OPERA 8ILITY of the above required A.C. offsite sources by performing Surva111ance Requirement 4.8.1.1.la, within I hour and at least once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter. If the diesel generator became inoperable due to any cause other than preplanned preventive maintenance or testing, demonstrate the OPERA 81LITY of the remaining OPERA 8LE diesel generator by perform-ing Surveillance Requirement 4.5.1.1.ta 4 within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months unless the diesel is already operating and loaded.I ) Restore the inoperable diesel generator to OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months or be in at least HOT STAN0gY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

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0uring performance of surveillance activities as a requirement for ACTION statements, the air-roll test shall not be performed.

COMANCHE FEAK - UNITS 1 AND 2 3/4 8-1 r

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LIMITING ColelTION FOR OPERATION fContinued)

ACTION fContinued) p'

'offsite source re'tored, s restore at least-two offsite circuits to.

OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months from time of initial loss or be in at least NOT STAN08Y within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months ,

f. With two of the above required diesel generators inoperable..

demonstrate the OPERA 81LITY.of two offsite A.C. circuits by performing Surveillance Requirement 4.8.1.1.la. within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months and at least once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter; restore at least one of the inoperable diesel generators to OPERABLE status within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months or be in at least HOT STAND 8Y within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months . Restore at least two diesel .

generators to OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months from time of initial loss or be in at least NOT STAN08Y within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

[ SURVEILLANCE REQUIREMENTS 4.8.1.1.1 Each of the above required independent circuits between the offsite transmission network and the Onsite Class IE Distribution System shall be:

a. Determined OPERABLE at least once per 7 days by verifying correct

/ b.

breaker alignments, indicated power availability, and Demonstrated OPERA 8LE at least once per 18 months during shutdown by transferring (manually and automatically) the 6.9 kV safeguards bus.

power supply from the preferred offsite source to the alternate offsite source.

4.8.1.1.2 Each diesel generator shall be demonstrated OPERABLE:

a. At least once per 31 days on a STAGGERED TEST BASIS by: l

1) Verifying the fuel level in the day fuel tank,

2) Verifying the fuel level in the fuel storage tank,

3) Verifying the fuel transfer pump starts and transfers fuel from the storage system to the day fuel tank, f

4) Verifying'the diesel starts from ambient condition and accelerates to at least 441 rpe in less than or equal to 10 seconds.*f

All planned diesel engine starts for the purpose of this surveillance may be preceded by a prelube period in accordance with vendor recommendations.

The diesel generator start time (10 seconds) shall be verified at least once per 184 days. All other engine starts for performance of this surveillance, may use a diesel generator start involving gradual acceleration to synchronous speed as reconsnended by the manufacturer.

COMANCHE PEAK - UNITS 1 & 2 3/4 8-3 Unit 1 - Amendment No. 49,35 n - Unit 2 - Amendment No. M.21

g. With the Fuel Storage System volume less than 86,000 ga'lons but greater than 74.600 gallons of fuel for a dksel generator, restore the Storage System fuel oil level to a minimum volume of 86.000 gallons within 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months or immediately declare the associated diesel generator inoperable and perform the applicable ACTION for an inoperable diesel generator (s),

h. With the Fuel Storage System volume equal to 74.600 gallons or I less for a diesel generator, immediately declare the diesel generator I inoperable and perform the applicable ACTION for an inoperable f diesel generator [s].

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i ELECTRICAL POWER SYSTENS '

A.C. SOURCIS i

.3 SHUTDOInf 1 Ej

'b_g LIMITING CONDITION FOR OPERATION t

k i 3.8.1.2 Asaminimum,thefollowing*T I

. ) shall be

uj 1 OPERABLE: -

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a. One circuit between the offsit ransmission network and the Onsite l g i Class IE Distribution System, ,

.) g b. One diesel generator with:

l 1) Day fuel tank containing a minimum volume of 1440 gallons of

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< 8q APPLICABILITY: MODES 5 and 6.

ACTION:

hWithlessthantheaboveminimumrequiredA.C.electricalpowersources OPERABLE, immediately suspend all operations involving CORE ALTERATIONS, positive reactivity changes, movement of irradiated fuel, or crane operation I with loads over the fuel storage pool, and within 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months , depressurize and vent the Reactor Coolant System through a greater than or equal to 2.98 square inch vent. In addition, when in MODE 5 with the reactor coolant loops not i filled, or in MODE 6 with the water level less than 23 feet above the reactor '

vessel flange, immediately initiate corrective action to restore the required '

sources to OPERABLE status as soon as possible.

P W SURVEILLANCE REQUIREMENTS pO i 4.8.1.2 The above required A.C. electrical power sources shall be demonstrated OPERABLE by the performance of each of the requirements of !

4 IE d'g Specifications 4.8.1.1.1 and 4.8.1.1.2* (except for Specification i

3 t f'\ 4.8.1.1.2a.5). l I

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E td M p *The 18 month surveillance test interval is extended to 24 months for Train A, b o Unit 2 to remain in effect until the completion of the second refueling j outage for Unit 2.

'e w COMANCHE PEAK - UNITS 1 AND 2 3/4 8-10 2 @Y

$3 t -a Unit 1 - Amendment No. M,35 !

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_ _ Unit 2 - Amendment No. H. 21 l

b. With the Fuel Storage System volume less than 75.000 gallons but

% greater than 65,600 gallons of fuel for the diesel generator, restort ;

~2 7 the Storage System fuel oil level to a minimum volume of 75.000 hO O un {

( gallons within 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months or immediately declare the diesel generator {

h inoperable and perform ACTION a.

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c. With the Fuel Storage System volume equal to 65,600 gallons or less.

immediately declare the diesel generator moperable and perform ACTION a.

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I 1/4.8 fttcTRICAL POWER SYSTEMS l

RASES ,;

3/4.3.1 H/4.3.f. and 3/4.3.1 A.C. 100Rcrt. D.C. SOURCES. and DNEITE POWrt DISTklBUT: DN The OPERABILITY of the A.C. and 0.C power sources and associated distribu-tion systems during operation ensures that sufficient power will be available to supply the safety-related equipment required for: [1) the safe shutdown of the i factitty, and (2) the attigation and control of acetdent conditions within the-factitty. The minious specified independent and redundant A.C. and D.C. power i sources and distribution systems satisfy the requirements of General Design Criterton 17 of 10 CFR 50 Appenca A. ;

The ACTION requirements specified for the levels of degradation of the power sources provide restriction upon continued factitty operation consensurate ;

with the level of deeradation. The OPERABILITY of the power sources are consts-tent with the initial condition assumptions of the safety analyses and are based upon saintaining at least one redundant set of ensite A.C. and D.C. power sources and associated distribution systems OPERABLE during accident conditions' +

coincident with an assumed loss-of-offsite power and single fallun of the other onsite A.C. source. The A.C. and D.C. source allowable out-of-service times are based on Regulatory Guide 1.g3, ' Availability of Electrical Power Sources," ,

December 1974 and Generic Letter 84-15, ' Proposed Staff position to leprove and l Maintain Diesel Generator Reliability.' When one diesel generator is inoper- j able, there is an additional ACTION requirement to verify that all required sys- ,

tems, subsystees, trains, components and devices, that depend on the remaining '

OPERABLE diesel generator as a source of emergencypwer, are also OPERA 8LE, and '

that the steam-driven auxiliary feedwater pump is OPERABLE. This requirement is intended to provide assurance that a less-of-offsite power event will not result .

in a complete loss of safety function of critical systems during the period one >

verify, as used in this con-of textthe means diesel to generators administrative is 1y inoperable. The tem, logs or other infomation to check by erasining determine if certain components are out-of-service for maintenance or other reasons. It does not meaa to perform the Surveillance Requirements needed to demonstrate the OPERA 81LITY of the component.

The OPERABILITY of the etnimum specified A.C. and 0.C. power sources and !

associated distribution systems during shutdown and refueling ensures that: :

(1) the fact 11ty can be maintained in the shutdown or refueling condition for t extended time periods, and (2) sufficient instrumentation and control capablitty is available for monitoring and maintaining the unit statu{s-- W Mos<$ CASA %nd_ Q The OPERABILITY of the day fuel tank and fuel storage syst are b M on ~ !

the following: L1) the minimum day fuel tank volme ensures suff tent fuel :

innedtately aval'able to operate the diesel generator at the continuous rating ,

for 60 minutes plus 10 percent, and (t) the remaining day fuel tank vcluse (between that required for (1) above and the volume specified in the Limiting Conditions for Operation), combined with the minimum specified Fuel Storage System volume, ensures sufficient onsite fuel oil storage capacity to operate .

the diesel generator at the continuous rating for seven days. !

F gp COMANCHE PEAK - UNITS 1 AND 2 8 3/4 8-1

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The OPERABILITY of the day fuel tank and Fuel Storage System during MODES 5 )

and 6, are based on the following: (1) the minimum day fuel tank volume ensures sufficient l fuel immediately available to operate the diesel generator at the continuous rating during

> MODES 5 and 6 for 60 minutes plus 10 percent, and (2) the remaining day fuel tank volume (between that required for (1) above and the volume specified in the Limiting Conditions for Operation), combined with the minimum specified Fuel Storage System volume, ensures sufficient onsite fuel oil storage capacity to operate the diesel generator to power the required electrical loads during shutdown conditions for seven days.

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_A.C. EDURcES. D.C. 100Rc[S. and DNSITE POWER DISTRIBUTION (Continued) {

.The Fuel Storage System consists of the fuel oil storage tank and is equivalent to the ANSI N195-1976 definition for supply tank.

r j The Surveillance Requirements for demonstrating the'0PERASILITY of the !

diesel generators are in accordance with the recommendations of Regulatory t Guides 1.9, " Selection of Diesel Generator Set Capacity for Standby Power Supplies.* March 10, 1971; 1.108, ' Periodic Testing Diesel Generator Units *

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Used as Onsite Electric Power Systems at Nuclear Power Plants," Revision 1 August 1977; and 1.137.." Fuel-011 Systems for Standby Diesel Generators,* .

January 1978; Generic Letter 84-15, Generic Letter 83-26, ' Clarification of Surveillance Requirements for Diesel Fuel Impurity Level Tests,' and Generic i Letter 94-01, ' Removal of Accelerated Testing and Special Reporting Requirements for Emergency Diesel Generators."

The Surveillance Requirement for demonstrating the OPERA 8ILITY of the station batteries are based on the recommendations of Regulatory Guide 1.129, i

" Maintenance Testing and Replacement of Large Lead Storage Batteries for Nuclear Power Plants," Revision 1. February 1978 Regulatory Guide 1.32, I

" Criteria for Safety Related Electric Power Systems for Nuclear Power Plants,' l Revision 2, February 1977, and IEEE STD 450-1980, 'IEEE Reconnended Practice .

for Maintenance Testing, and Replacement of Large Lead Storage Batteries for Generating Stations and substations.' {

D The operational requirement to energize the instrument busses from their associated inverters connected to its associated D.C. bus is satisfied only !

when the inverter's output is from the regulated portion of the inverter and .!

not from the unregulated bypass source via the internal static switch.

Verifying average electrolyte temperature above the minimum for which the !

battery was sized, total battery terminal voltage on float charge, connection [

t resistance values, and the performance of battery service and discharge tests ;

ensures the effectiveness of the charging system, the ability to handle high i discharge rates, and compares the battery capacity at that time with the rated capacity. .

) !

j Table 4.8-2 specifies the normal limits for each designated pilot cell i and each connected cell for electrolyte level, float voltage, and specific t J

gravity. The limits for the designated pilot cells float voltage and specific gravity, greater than 2.13 volts and 0.015 below the manufacturer's full ,

j charge specific gravity or a battery charger current that had stabilized at a '

low value, is characteristic of a charged cell with adequate capacity. The !

normal limits for each connected cell for float voltage and specific gravity, '

greater than 2.13 volts and not more than 0.020 below the manufacturer's full i charge specific gravity with an average specific gravity of all the connected !

I) cells not more than 0.010 below the manufacturer's full charge specific '

gravity, ensures the OPERA 8ILITY and capability of the battery. ;

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[ I l COMANCHE PEAK - UNITS 1 & 2 8 3/4 8-2 Unit 1 - Amendment No. 35 i f

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, - Unit 2 - Amendment No. 21 If the 7 day fuel oil supply for a diesel generator is not available, the diesel generator '

remains OPERABLE while corrective action is taken. Howeser the condition is restricted to fuel oil reductions that naintain at least a 6-day fuel oil supply. These circumstances may be

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l caused by events, such as full load operation required after an inadvertent start while at i

minimum required level, or feed and bleed operations which may be necessitated by .

increasing particulate levels or any number of other oil quality degradations. This restriction allows sufficient time for obtaining the requisite replacement volume and performing the j

analysis required prior to addition of fuel oil to the tank. A period of 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months is considered sufncient to complete restoration of the required level prior to declaring the diesel generator ;

inoperable. This period is acceptable based on the remaining capacity (> 6 days). the fact that y

action will be initiated to obtain replenishment, and the low probability of an event during this brief period. !

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ENCLOSURE 1 TO TXX 95090 APPLICABLE PAGES OF NRC REGULATORY GUIDE ~ Ji l

l 1.137 REVISION 1 (PAGES 1.137 1 AND 1.137 2)' .;

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Revision 1 U.S. NUCLEAR RECULATCRY COMMISSION october 197s

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GUIDE :

@k..... REGULATORY OFRCE OF STANDARDS DEVELOPMENT REGULATORY GUIDE 1.137 FUEL-OIL SYSTEMS FOR STANDBY DIESEL GENERATORS A. INTRODUCTION C. REGULATORY POSITION General Design Criterion 17, " Electric Power Systems," 1. The requirements for the design of fuel-oil systems of Appendix A," General Design Criteria for Nuclear Power for diesel generators that provide standby electrical power Plants," to 10 CFR Part 50, " Domestic Licensing of Produc. for a nuclear power plant that are included in ANSI N195-tion and Utilization Facilities," requires that an onsite elec- 1976," Fuel Oil Systems for Standby Dieself,enerators,"8 tric power system and an offsite electric power system be provide a method acceptable to the NRC staff for comply-provided to permit functioning of structures, systems, and ing with the pertinent requirements of General Design components important to safety. In addition, Criterion 17 Criterion 17 of Appendix A to 10 CFR Part 50, subject to contains requirements concerning system capacity,capabil- the following:

ity, independence, redundancy, availability, testability, and reliability. Appendix B," Quality Assurance Criteria for Nu- a. Throughout ANSI N195-1976, other documents clear Power Plants and Fuel Reprocessing Plants," to 10 CFR required to be included as part of the standard are either Part 50 establishes overallquality assurance requirements for identified at the point of reference or described in Section '

the design, construction, and operation of structures, sys- 7.4, " Applicable Codes, Standards, and Regulations," or in tems, and components important to safety. This regulatory Section 11, " References," of the standard. The specific ac- '

guide describes a method acceptable to the NRC staff for ceptabil'ty of these listed documents has been or will be complying with the Commission's regulations regarding fuel- addressed separately in other regulatory guides or in Com- ,

oil systems for standby diesel generators and assurance of mission regulations, where appropriate, adequate fuel-oil quality. The Advisory Committee on .

Reactor Safeguards has been consulted concerning this b.Section I, " Scope," of ANSI N195-1976 states guide and has concurred in the regulatory position. that the standard provides the design requirements for the fuel oil system for standby diesel generators and that it sets B. DISCUS $10N forth other specific design requirements such as safety class.

materials, physical arrangement, and applicable codes and Working Group ANS 59.51 of Subcommittee ANS-50,Nu- regulations. The standard does not specifically address l clear Power Plant Systems Engineering, of the American quality assurance, and in this regard ANSI NI95-1976 National Standards Committee N18, Nuclear Design Cri- should be used in conjunction with Regulatory Guide teria, has prepared a standard that provides design require- 1.28, " Quality Assurance Program Requirements (Design ments for the fuel oil systems for standby diesel generators, and Construction)," which endorses ANSI N45.2-1977, This standard was approved by the American NationalStand- " Quality Assurance Program Requirements for Nuclear ards Committee N18 and its Secretariat, and it was subse- Power Plants," for the design, construction, and mainten-quently approved and designated ANSI N1951976 by the ance of the fuel-oil system.

American National Standards Institute on April 12,1976. l For proper operation of the standby dieselgenerators, itis quirements," of the standard sets forth two methods for the necessary to ensure the proper quality of the fuel oil. Appen- calculation of fuel-oil storage requirements.These two meth-dix B to ANSI N195-1976 addresses the recommended fuel- ods are (1) calculations based on the assumption that the oil practices. Although not a mandatory part of the stand- diesel generator operates continuously for 7 days at its rated ard, the staff believes Appendix B can serve as an accept- capacity, and (2) calculations based on the time dependent l able basis for a program to maintain the quality of fueloil, as supplemented by regulatory position 2 of this guide.

Icopies msy be obt.ined from the Amerie.n Nucle.r Society, Lines indic.te subst.ntive ch.nees from previous insue, sss North Kensington Avenue. La Cr.nge Fork, Ittinois 60s2s.

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loads of the diesel generator. For the time-dependent load Practice-Control of External Corroeion on Underground or method, the minimum required capacity should include the Submerged Metallic Piping Systems."3 in addition, the ,

capacity to power the engineered safety features. impressed current-type cathodic protection system should ;

be designed to prevent the ignition of combustible vapors

d. Section 7.3, " Physical Arrangement," of AND or fuel oil present in the fuel oil systems for standby diesel N195-1976 states that "the location of day tanks shall be at generators.

< required by the diesel engine manufacturer."in addition to this requirement, the physical location of the day tank h. Section 7.5 of the standard includes requirements relative to the engine and design of the engine fuel system for fire protection for the diesel-generator fuel-oil system.

should take into account such items as net positive suction The requirements of Section 7.5 are not considered a part -

head requirements and the potential need for electric fuel of this regulatory guide since this subject is addressed pumps powered from a reliable power supply to ensure separately in more detail in other NRC documents. Thus a that the diesel-generator unit can start automatically and commitment to follow this regulatory guide does not imply tttain the required voltage and frequency within acceptable a commitment to follow the requirements of Section 7.5 timits and time. concerning fire protection. ,

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e. Section 7.3 of ANSI N195-1976 states that the 2. Appendix B to ANSI N195-1976 should be used as a ,

arrangement of the fuel oil system "shall provide forinservice basis for a program to ensure the initial and continuing inspection and testing in accordance with ASME Boiler and quality of fuel oil as supplemented.by the following:

Pressure Vessel Code,Section XI, ' Rules for Inservice In-spection of Nuclear Power Plant Components.'" For those a. The oil stored in the fuel-oil supply tank, and the i portions of the fuel-oil systems for standby diesel generators oil to be used for filling or refilling the supply tank, should ,

that are designed to Section !!!, Subsection ND of the Code, meet the requirements of Federal Fuel Oil Specification an acceptable method of meeting the requirements of Sec. VV.F 800b (April 2,1975); ASTM D975 77, " Standard i tion 7.3 is to ensure that the system arrangement would Specification for Diesel Fuel Oils;" or the requirements of allow: the diesel-generator manufacturer, if they are more restrict-ive, as well as the fuel-oil total insolubles level specified 14 ,

(1) Pressure testing of the fuel-oil system to a Appendix B to the standard. The " cloud point"should be s

pressure 1.10 times the system design pressure at 10-year less than or equal to the 3-hour minimum soak temperatum intervals. In the case of storage tanks, recommendations of or the minimum temperature at which the fuel oil will be I

the tank vendor should be taken into account when estab- maintained during the period of time that it will be stored.

lishing the test pressure, if test results for viscosity or for water and sediment for l fuel oil contained in the supply tanks exceed the limits !

(2) A visual examination to be conducted during specified in the applicable specification, the diesel should .

the pressure test for evidence of component leakages, be considered inoperable. Fuel oil contained in the supply !

structural distress, or corrosion. in the case of buried tank not meeting remaining applicable specification require- ;

components, a loss of system pressure during the test ments should be replaced in a short period of time (about a >

ctnstitutes evidence of component leakage, week). l t

f. Section 7.3 of ANSI N195-1976 requires that b. Prior to adding new fuel oil to the supply tanks, adequate heating be provided for the fueloil system. onsite samples of the fuel oil should be taken. As a mini-Assurance should I;c provided that the fuel oil can be sup- mum, prior to the addition of new fuel, tests far de '

plied and ignited at all times under the most severe environ- following properties should be conducted:

mental conditions expected at the facility. This may be accomplished by use of an oil with a " cloud point" lower (1) Specific or API gravity than the 3-hour minimum soak temperature2 expected (2) Water and sediment at the site during the seasonal periods in which the oilis to (3) Viscosity ,

be used, and/or by maintenance of the onsite fuel oil above l' the " cloud point" temperature. Test results for the latter two tests should not exceed the limits specified in the applicable specification. Analysis of

g. Section 7.5,"Other Requirements,"of the standard the other properties of the fuel oillisted in the applicable states that " protection against external and internal corro- specification should be completed within 2 weeks of the ,

sion shall be provided" for the fuel-oilsystem. To amplify addition.

this requirement for buried supply tanks not located within la vault and other buried portions of the system, a protec- c. The periodic sampling procedure for the fuel oil tive coating and an impressed current type cathodic protec- should be in accordance with ASTM D270-1975," Standard tion system should be provided in accordance with NACE Method of Sampling Petroleum and Petroleum Products."*

Standard RP-0149 - (1972 Revision), " Recommended 3 Copies may be obtained from the National Association of Corro-Jon Engineers, 2400 West Loop South, Houston, Texas 77027.

2J.P. Doner,"A Predictive Study for Defining Limiting Tempera-tures and their A pitcationin Petroleum Product 5pecifications."U.S. 4 Army, Mobility pment Research and Development Center, Coat. Also dealsnated ANSI Zit.33-1976. Copies may be obtained i ing and Chemical boratory Aberdeen Proving Ground, Maryland, from the American National Standards institute,143o Broadway, CCL Report No. 3ta. New York, N.Y. Ioot B.

1.137-2

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4 i

l ENCLOSURE 2 TO TXX 95090 APPLICABLE PAGES OF ANSI N195 1976 (COVER PAGE AND PAGE 3) i s

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fuel oil systems for l standby diesel-generators ;

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I Arnerican National Standard ANSI N1951976/ANS 59.51 .[

basis event or accident without interrupting the l

' Fa = Fuel consumption rate associated with operation of the dimel(s), whichever is longer. ,

. Storage capacitf shall be calculated in ac-- the continuous rating of the diesel (1/ min or ' "

gal / min) cordance with 5.4. !

L# < If C<C' then C shall be increased by a minimum -

margin of 10%. 1 5.4 Calculation of Fuel Oil Storage Re- ;

quirements. - The fuel oil storage capacity Note: The fuel oil storese requireawnis listed in 5.2. 5.3. and requirement of 5.2 or 5.S'shall be calculated 5.4 m in accordance with Crieeria for Class IE Power. :ii Systems for Nuclear Power Generating Stenons, IEEE-30s. -

based upon the diesel-generator (s) operating at a74 13) the minimum required capacity for the plant l condition ~ which -is most limiting for the ' 4. Consponent Performance calculation of euch capacity. The design shall !

Re luiremente j take into account the time dependence of diesel

generator loads. That is, if diesel-generator load 6.1 Tanke. Each diesel shall be equipped with ;

increases or decreases during the event, the load day or integral tank or tanks whose capacity is '

changes shall be included in the required fuel sufficient to maintain at least 60 minutes of storage calculation. If the design includes operation at the lowl where ' oil is automatically ,

provision for an operator to supply power to added to the day or integral tank or tanks. This - t equipment other than the minimum required for - capacity shall be based on the fuel consumption the plant condition, such additional load (s) at a load of 100% of the continuous rating of the ~ i shall be included in the calculation of required diesel plus a minimum margin of 10%. An over- '

fuel storage capacity. A conservative alternati" flow line from the day or integral tank to the to calculating the total fuel storage based on supply tank shall be provided. Suction from the -

time dependent loads is to calculate the storage day or integral tank or tanks shall be from capacity by assuming that the diesel operates abow th tank bottom.

continuoush for seven days at its rated capacity.

The conservatin calculation is recommended. 6.2 Pumps. Pumps shall be located so that suf . !

The ~ calet:lation shall include an explicit ficient not positive suction head is available un- . -

allowance for fuel consumption required by der all design conditions. Pumps shall have suf- ^

periodic testing. The calculation shall also in- ficient head and capacity to transfer oil to in-clude the' fuel required for operation of the - tegral or day tanks as required, considering the :

engine at the minimum loads specified by the fuel consumption rate at the continuous rating I engine manufacturer. of the diesel. Pumps shall be sized so that ex- '

A minimum margin of 10% shall be added to cessive cycling is prevented.

the calculated storage requirement if the con- '

servatin alternate calculation is not used. g.8 Strainer. A strainer shall be provided for In equation ' form, these requirements are each engine. The mesh of the strainers shall be !

stated as: as requ red to prewns overloading of the engine fuel filter. The strainer shall be of duplex C =I[F(1,)]t, + T 1

d**i8"-

It, = 7 days L where '

g.4 Design Proesures and Temperatures, t C = Minimum storage capacity (litem or gal) Appropriate design pressures and temperatures F(la = Fuel consumption rate for load 1 shall be selected for all of the system com- ,

during time interval i (1/ min or gal / min) ponents. These parameters shall be based on

' t, = IAngth of time interval i (min) consideration of the environmental conditions to T = Fuel volume consumed by testing (1 or be experienced by the equipment, and con-l gal) sideration of factors such as the static head of l

The conservatiw optional calculation is ex- oil in tanks and piping and the maximum pump '

pressed as: head.

C' = (Fa ) (7 days) (1440 min / day) + T 7. Design Requiremente C' = Minimum storage capacity by optional l calculation (1 or gal) 7.1 Safety Class. Fuel oil system piping and 3

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ENCLOSURE 3 T0 TXX 95090 :

APPLICABLE FASES OF NUREG 1431 REVISION 0. 1 (COVER PAGE AND PAGES 3.8 21, 3.8 22,-

B 3.8 40, B 3.8 41, B'3.8 42, B 3.8 43 AND B 3.8 44)

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e NUREG-1431 .

Vol.1 l 1

Standard Technical Specifications !

Westinghouse Plants ;

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Specifi. 'ons i

Issued by the i U.S. Nuclear Regulatory Commission :

I Omce of Neckar Reactor Regulation !

September 1992 .

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i/ . Dies 01 Fuel 011 Lube Oil, and Starting' Air 3.8.3 g.

-3.8 ' ELECTRICAL POWER SYSTEMS 3.8.3 Diesel Fuel Oil, Lube Oil, and Starting Air LCO 3.8.3 The stored diesel fuel oil, lube oil, and starting air subsystem shall be within limits for each_ required diesel {

generator (DG). i APPLICA81LITY: When associated DG is equired to be OPERA 8LE.

I

-l ACTIONS

-l

.....................................N0TE.....................................

Separate Condition entry is allowed for each 06.

CONDITION REQUIRED ACTION COMPLETION TIME A. One or more DGs with A.1 Restore fuel oil 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months fuel level level to within

< ;33,000; gal and limits.

1. > 28,285 gal in storage tank.

8. One or more DGs.with B.1 Restore lube oil 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months lube oil inventory inventory to within

< 500 gal and limits.

> ;425; gal.

C. One or more DGs with C.1 Restore fuel oil 7 days stored fuel oil total total particulates within limit.

l $articulateswithin isit.

l (continued) i l

l WOG STS 3.8-21 Rev. 0,09/28/92

s 3

~

, f . . .' . Diesel Feel Oil, Lub3 Of 1, and Starting Air 3.8.3 ACTIONS (continued) ,

CONDITION REQUIRED ACTION C00LETION TINE

.. 1 D. One or more DGs with D.1 Restore stored fuel 30 days new fuel oil oil properties to ,

properties not within within limits. l limits. ,

i E. One or more DGs with E.1 Restore starting air 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months !

starting air receiver receiver pressure to '

pressure < [225] psig n [225] psig.

and n [125] psig. l

?

F. Required Action and F.1 Declare associated DG Immediately -

associated Completion inoperable. t Time not set.

9E One or more DGs diesel fuel oil, lube oil, or starting air subsystem i not within limits for j reasons other than i Condition A, 8, C, D, '

or E. i i

SURVEILLANCE REQUIRENENTS SURVEILLANCE FREQUENCY :

t i

SR 3.8.3.1 Verify each feel oil storage tank contains 31 days a [53,000] gal of fuel.

l (continued)-

WOG STS 3.8-22 Rev. 0,09/28/92 l

I

j ' ' ' " * 'DieselFuel011; Lube 011,andStartin$.Mr' 8 8.3 1 o j 8 3.8 ELECTRICAL POWER SYSTEMS l B 3.8.3 Diese# Fuel Oil, Lube Oil, and Starting Air ]

BASES l 1

BACKGROUND Each diesel generator (DG) is provided with a storage tank :

having a fuel oil capacity sufficient to operate that diesel !

for a period of 7 days while the DG is supplying maximum !

post loss of coolant accident load demand discussed in the ;

FSAR, Sectiori [9.5.4.2] (Ref.1). The maximum load demand j is calculated using the assumption that a minimum of any two i DGs is available. This onsite fuel oil capacity is sufficient to operate the DGs for longer than the time to !

replenish the onsite supply from outside sources.

-l Fuel oil is transferred from stora 1 eitheroftwotransferpumpsassocfetanktodaytankby ated with each storage j tank. Redundancy of pumps and piping precludes the failure '

of one cump, or the rupture of any pipe, valve or tank to- i result in the loss of more than one DG. All outside tanks, I pumps, and piping are located underground.

For proper operation of the standby DGs, it is necessary to ensure the proper quality of the fuel oil. Regulatory ,

Guide 1.137 (Ref. 2) addresses the recommended fuel oil ;

practices as supplemented by ANSI N195 (Ref. 3). The fuel !

oil properties governed by these SRs are the water and l sediment content, the kinematic viscosity, specific gravity !

(orAPIgravity),andimpuritylevel. l The DG lubrication system is designed to provide sufficient l lubrication to pemit proper operation of its associated DG !

under all loading conditions. The system is required to !

circulate the lube oil to the diesel engine working surfaces '

and to remove excess heat generated by friction during operation. Each engine oil sump contains an inventory capable of supporting a minimum of [7] days of operation. 1

[The onsite storage in addition to the engine oil sum ;

sufficienttoensure7daysofcontinuousoperation.)p-is This l supply is sufficient to allow the operator to replenish lube i oil from outside sources.

Each DG has an air start system with adequate capacity for five successive start attempts on the DG without recharging the air start receiver (s).

(continued)

W0G STS B 3.8-40 Rev. 0, 09/28/92 I

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'. m * .

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Diesel Futi 011,' Lub2 011, and Starting Air .

8 3.8.3 i ;

ty s* ;

' BASES--(continued) !

.)

APPLICA8LE The initial conditions of Design Basis Accident (DBA) and- L SAFETY ANALYSES transient analyses in the FSAR, Chapter [6] (Ref.- 4), and in .

the FSAR, Cha !

Feature (ESF)pter systems[15]

are (Ref. 5), assume OPERABLE. Engineered The DGs are designedSafety to ~

provide sufficient capacity, capability, redundancy, and' !

reliability to ensure,the availability of necessary power to ,

ESF systems so that fuel, Reactor. Coolant System and !

containment design limits are not exceeded. These limits !

are discussed in more detail in the Bases for Section 3.2, ;

Power Distribution Limits; Section 3.4, Reactor Coolant !

System (RCS); and Section 3.6, Containment Systems. !

< Since diesel fuel oil, lube oil and the air start subsystem l support the operation of the standby AC power sources, they :

satisfy Criterion 3 of the NRC Policy Statement. j l

r LCO Stored diesel fuel oil is :equired to have sufficient supply ;

for 7 days of full load operation. It is also required to ,

meet specific standards for quality. Additionally, i sufficient lubricating oil supply must be available to ;

ensure the capability to operate at full load for 7 days, i This requirement, in conjunction with an ability to obtain j replacement supplies within 7 days, supports the >

availability of DGs required to shut down the reactor and to i maintain it in a safe condition for an anticipated '!

operational occurrence (A00) or a postulated DBA with loss- !

of offsite power. DG day tank fuel requirements, as well as !

transfer capability from the storage tank to the day tank, !

are addressed in LC0 3.8.1,AC Sources-Operating," and l LC0 3.8.2, 'AC Sources-Shutdown." j.

The starting air system is required to have a minimum !

capacity for five successive OG start attempts without i recharging the air start' receivers. !

APPLICABILITY The AC sources (LCO 3.8.1 and LC0 3.8.2) are required to ensure the availability of the required power to shut down the reactor and maintain it in a safe shutdown condition after an A00 or a postulated DBA. Since stored diesel fuel i oil, lube oil, and the starting air subsystem support i LC0 3.8.1 and LC0 3.8.2, stored diesel fuel oil, lube oil, i l

I (continued) 1 WOG STS 8 3.8-41 Rev. 0,09/28/92

l

'L,,f. [, Diesel Fuel 011 Lube Oil, and Starting Air I B 3.8.3 :)

l BASES 1

l APPLICABILITY and starting air are required to be within limits when the l (continued) associated DG is required to be OPERABLE.

t ACTIONS M In this Condition, the 7 day fuel oil supply for a DG is not !

available. However, the Condition is restricted to fuel oil !

level reductions that usintain at least a 6 day supply. :

These circumstances may be caused by events, such as full !

load operation required after an. inadvertent start while at i minimum required level, or. feed and bleed operations, which :

may be necessitated by increasing particulate levels or any !

number of other oil quality degradations. This restriction j allows sufficient time for obtaining the requisite t replacement volume and performing tlw analyses required !

prior to addition of fuel oil to the tank. A period of 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months is considered sufficient to complete'restorath,n of j the required level prior to declaring the DG inoperable. ,

This period is acceptable based on the remaining capacity l

(> 6 days), the fact that procedures will be in<tiated to j obtain replenishment, and the low probability of an event !

during this brief period. !

M i dith lube oil inventory < 500 gal, sufficient lubricating l oil to support 7 days of continuous DG operation at full ;

load conditions may not be available. However, the ;

Condition is restricted to lube oil volume reductions that i maintain at least a 6 day supply. This restriction allows sufficient time to obtain the requisite replacement volume. !

A period of 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months is considered sufficient to complete j restoration of the required volume prior to declaring the DG j inoperable. This period is accestable based on the :

remaining capacity (> 6 days), tw low rate of usage, the l fact that procedures will be initiated to obtain }

replenishment, and the Icw probability of an event during l this brief period. l

[

i (continued) )

l l

!~ WOG STS B 3.8-42 Rev. 0, 09/28/92 l

P. '

T Dicsel Fuel Oil, Lube Oil, cnd Starting Air I 4

,- .- w. g 3,g,3 BASES

)

. ACTIONS .Q.d (continued)

This Condition is entered as a result of a failure to meet the acceptance criterion of SR 3.8.3.5. Nomally, trending of particulate levels allows sufficient time to correct high particulate levels prior to reaching the limit of acceptability. . Poor sample procedures (bottom sampling), l contaminated sampling equipment, and errors in laboratory analysis can produce failures that do not follow a trend. ;

Since the presence of particulates does not mean failure of the fuel oil to burn properly in the diesel engine, and particulate concentration is unlikely_ to change significantly between Surveillance Frequency intervals, and proper engine performance has been recently demonstrated j (within 31 days), it is prudent to allow a brief period prior to declaring the associated DG inoperable. The 7 day ,

Completion Time allows for further evaluation, resampling l and re-analysis of the DG fuel oil. ,

i M :

With the new fuel oil properties defined in the Bases for - l SR 3.8.3.4 not within the required Itaits, a period of :

30 days is allowed for restoring the stored fuel oil i properties. This period provides sufficient time to test }

the stored fuel oil to detemine that the new fuel oil, nhen :

mixed with previously stored fuel oil, remains acceptable. l or to restore the stored fuel oil properties. This !

restoration may involve feed and bleed procedures, j filtering, or combinations of-these procedures. Even if a ;

DG start and load was required during this time interval and '

the fuel oil properties were outside limits, there is a high-likelihood that the DG would still be capable of performing its intended funct. ion. .

Ed With starting air receiver pressure < [225] psig, sufficient capacity for five successive DG start attempts does not ;

exist. However, as long as the receiver pressure is !

> [125] psig, there is adequate capacity for at least one ,

start attempt, and the DG can be considered OPERA 8LE while !

the air receiver pressure is restored to the required limit. {

A period of 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months is considered sufficient to complete I (continued)

'WOG STS B 3.8 43 Rev. 0, 09/28/92 l

l'

T; 7

,. 5

'"^* Dicsel Fuel 011. Lube Oil, and Starting Air 8 3.8.3 BASES ACTIONS Ed (continued) i restoration to the required pressure prior to declaring the :

DG inoperable. This period is acceptable based on the !

remaining air start capacity, the fact that most DG stants '

are accomplished on the first attempt, and the low l probability of an event during this brief period. f i

f.d ,

With a Required Action and associated Completion Time not i met, or one or more DG's fuel oil or lube oil not within !

limits for reascos~ other than addressed by Conditions A through D, the associated DG may be incapable of perfoming its intended function and must be famediately declared l inoperable. ,

SURVEILLANCE SR 3.8.3.1 I REQUIREMENTS This SR provides verification that there is an adequate -

inventory of fuel oil in the storage tanks to support each !

DG's operation for 7 days at full load. The 7 day period is 1 sufficient time to place the unit in a safe shutdown f condition and to bring in replenishment fuel from an offsite location.

The 31 day Frequency is adequate to ensure that a sufficient ;

supply of fuel oil is available, since low level alarms are :

provided and unit operators would be aware of any large uses- i of fuel oil during this period. i L

SR 3.8.3.2 This Survet11ance ensures that sufficient lube oil inventory is available to support at least 7 days of full load !

operation for each DG. The [500] gal requirement is based :

on the DG manufacturer consumption values for the run time of the DG. Iaplicit in this SR is the requirement to verify :

the capability to transfer the lube oil from its storage i location to the 06, when the 06 lube oil sump does not hold adequate inventory for 7 days of full load operation without j i

l i

(continued) l WOG STS B 3.8 44 Rev. 0, 09/28/92

- -. - -

ML20082U843

Text

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