Text

Proposed Tech Specs Eliminating Unnecessary Testing of Sdg
	ML20058D157
Person / Time
Site:	South Texas
Issue date:	11/23/1993
From:	; HOUSTON LIGHTING & POWER CO.
To:	;
Shared Package
ML20058D148	List: ML20058D157; ST-HL-AE-4625, Application for Amends to Licenses NPF-76 & NPF-80,proposing Changes to TS by Eliminating Unnecessary Testing of Sdg;
References
	NUDOCS 9312030077
	Download: ML20058D157 (10)
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ATTACHMENT 3 PROPOSED TECHNICAL SPECIFICATION CHANGES-i 5

9312030077.931323 DR ADOCK 05000498 PDR TSO\\9J-334,001

.I TSI - 0 20 3/4.8 ELECTRICAL POWER SYSTEMS 3/4.8.1 A.C. SOURCES g.-040 OPERATING UMLTING30MLU0tLE03.0PER8JUDN 3.8.1.1 As a minimum, the following A.C. electrical power sources shall be -

OPERABLE:

a.

Two physically independent circuits between the offsite transmission network and the onsite Class 1E Distribution System **, and b.

Three separate and independent standby diesel' generators, each with a separate fuel tank containing a minimum volume of 60,500 gallons of fuel.

APPLICABILITY:

MODES 1, 2, 3, and 4.

ACTION:

a.

With one offsite circuit of the above-required A.C. electrical power:

sources inoperable, demonstrate the OPERABILITY of the remaining A.C.

sources by performing Surveillance Requirement 4.8.1.1.1.a 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. -Ocmonstretc _th;

-0PERAM1ITY cf cach standby dic;cl generator that ha; not been ;u;-

ce:sful!y tested 'itMr the past 2' hour; by perfer*ing-Survei'l=e b;uirc = t '.S.I.1.2.0.2) for c;;h ;uch-standby dic;;1.g;ncrhter,

-;cpcrately, ithin 20 hour2.314815e-4 days 0.00556 hours 3.306878e-5 weeks 7.61e-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 HOT SHUTDOWN within th'e next 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months and in COLD SHUTDOWN within the'following 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

b.

With a standby diesel generator inoperable, demonstrate the OPERABILITY of the above-required A.C. offsite sources by performing-Surveillance Requirement 4.8 1.1.1.a within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months and at least once' Ogg s

per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter.

If 'Fe standby diesel generator became in-

1. g/gi coerable due to any cause other than,preplannned preventive main-f tenance or testing, demonstrate the OPERABILITY.of the remaining d

U OPERABLE standby diesel generators by performing Surveillance Require-ment 4.8.1.1.2.a.2) and for each such standby diesel generatory g((

8 separatelv withinf4 hours.

Restore the-inoperable standby diesel arWCH/O 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 g'

SHUTDOWN within the next 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

c.

With on.e offsite circuit and one standby diesel generator of'the above-required A.C. electrical power. sources inoperable, demonstrate the OPERABILITY of the remaining A.C. sources-by performing Specifica-tfon 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 there-af ter; and if the standby diesel generator became inoperable _due to

This tcst-is required is be cerpicted regeidies> uf M en uiu luvycioblu hteidbi

-dic;cl gencrator is i catui ed iv OPERA 51UiY.

- Loss of vne 13.8-kV Standby bus to 4.16 kV ESF bus line constitutes _ loss of~one offsite source.

Loss of two 13.8 kV Standby busses to 4.16 kV ESF. bus lines constitutes loss of two offsite 'ources.

s 5001H~TEXA5 - UNITS 1 & 2

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an inoperable support system,--an independently. testable j

component,'or ATTACHMENT:B.

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, unless~it can be demonstrated.there'is no potential: common modei failure for the remaining diesel. generator (s).

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ELECTRICAL POWER SYSTEMS TSI - 067 am LIMIILtiLCORDIU0tLf_0LDEEPAUDN ACTION (Continued)

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any cause other than' preplanned preventive maintenance or testing, a

a yrm /MO demonstrate the OPERABILITY of the remaining OPERABLE standby diesel fg generators by performing Surveillance Requirement 4.8.1.1.2a.2) within 8hourQ;restoreatleastoneoftheinoperablesourcestoOPERABLE status within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months or be in at least HOT STANDBY within the next gg 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 o py ggg3 at least two offsite circuits and three standby diesel generators to g

OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months from the time of initial loss or be in at least HOT STANDBY 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 .

WithonestandbydieselgeneratorinoperableinadditiontoACTI0f4b.

d.

or c. above, verify that:

1.

All required systems, subsystems, trains, components, and de-vices that depend on the remaining OPERABLE diesel generator as a source of emergency power are also OPERABLE, and 2.

When in MODE 1, 2, or 3, the steam-driven auxiliary feedsater pump is OPERABLE.

If these conditions are not satisfied within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months be in at least HOT STANDBY 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 .

With two of the above required offsite A.C. circuits inoperable, e.

-drcasteetc the OPERTSILITY cf threc standby dic;;l gcatrctors by

-fe4rsg-the requir=nts of Specificat4cn 5.8.1.1.20.2) w&tW-S hours unle n the standby dicsc1 generaters are already epcrating; restore at least one of the inoperable offsite sources to OPERABLE status within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months or be in at least HOT STANDBY within the next 6 hcurs. With only one offsite source restored, 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 HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTOOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

f.

With two or three of the above required standby diesel generators inoperable, demonstrate the OPERABILITY of two offsite A.C. circuits by performing the requirements of Specification 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; restore at least two standby 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 STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUT 00WN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

Restore at least three standby 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 least HOT STANDBY 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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M C;cl gs Crcicr 13 rC$tcred-te CP[E[.C3LIIY, 50VIH TEXAS - UNITS 1 & 2 3/48-2

1 ELECTRICAL POWER SYSTEMS EURVIILLMCLEEQUIREMfNTS 4.8.1.1.1 Each of the above required independent circuits between the offsite trimsmission network and the Onsite Class IE Distribution System shall be:

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

breaker alignments, indicated power availability, and l

b.

Demonstrated OPERABLE at least once per 18 months during shutdown by i

transferring the unit power supply from the normal circuit to each of the alternate circuits.

1 4.8.1.1.2 Each standby diesel generator shall be demonstrated OPERABLE:

i In accordance with the frequency specified in Table 4.8-1 on a a.

STAGGERED TEST BASIS by:

1)

Verifying the fuel level in its associated fuel tank, _

2)

Verifying the diesel starts from ambient condition and accele-rates to 600 rpm (nominal) in less than or equal to 10 seconds.-*-

The generator voltage and frequency shall be 4160 + 416 volts and 60 + 1.2 Hz within 10 second r after the start signal.

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The diesel generator shall be started for this test by using one of the following signals:

a)

Manual, or b)

Simulated loss-of-offsite power by itself, or c)

Simulated less-of-offsite power in conjunction with a Safety Injection test signal, or d)

A Safety Injection test signal by itself.

3)

Verifying the generator is synchronized, loaded to greater than or equal to 5500 kW in 4e : than cr equal to 10 minutc M and operateswithaloadgreaterithanorequalto5500kWfor_at~

least 60 minutes, and @dBuc6 win.mw#/ocru,-(c's RecoM&4d&d 4)

Verifying the standby diesel generator is aligned to provide standby power to the associated emergency busses.

These ditsel gener8ter 5tsits frem embient cunditions shall Le periv>&ed enly oncc per 104 dsy5 in these-svevei44ence test 5 and all cther-engin-start; for

-4Ae-fwepc;c cf thi; ;urvcillance testing-sha14-te precedcd by an enginc prelube

--pw4W a^d/cr other warcup precedere; such e5 gi adual ivodi iy (e150 seu) a ccum -

Gind6d by-thE sdnUf6ctUrir 50 th5i the G6Ch6niC5l 5tr655 6nd WC07 cn the

-diC5El insir.C $5 ninimiced.

SOUTH TEXA5 - UNITS 1 & 2 3/4 8-3

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ELECTRICAL POWER SYSTEMS LU EEll(bf(C E_M02LPJ1E]!I S.1C entin ye6 b.

At least once per 31 days and after each operation of the diesel where the period of operation was greater than or equal to I hour by checking for and removing accumulated water from its associated fuel tank; By sampling new fuel oil in accordance with ASTM-D4057 prior to c.

addition to storage tanks and:

1)

By verifying in accordance with the tests specified in ASTM-D975-81 prior to addition to the storage tanks that the sample has:

~

a)

An API Gravity-of within 0.3 degrees at 60 F, or a specific gravity of within 0.0016 at 60/60 F, when compared to the supplier's certificate, or an absolute specific gravity at 60/60 F of greater than or equal to 0.83 but less than 's equal to 0.89, or an API gravity of greater than or equal to 27 degrees but less than or equal to 39 degrees; b)

A kinematic viscosity at 40 C of greater than or equal to 1.9 centistokes, but less than or equal to.4.1 centistokes if gravity was not determined by comparison with the supplier's certification, I

c)

A flash point equal to or greater than p5 F; and d)

AclearandbrightappearancewithMh[4colorwhentested in accordance with ASTM-04176-8 k yg 2)

By verifying within 30 days of obtaining the sample that the other properties specified in Table 1 of ASTM-0975-81 are met when tested in accordance with ASTM-0975-81 except that the analysis for sulfur may be performed in accordance with ASTM-D1552-79, ASTM-D2622-82, or ASTM-04294-83.

d.

At least once every 31 days by obtaining a sample of fuel oil in accordance with ASTM-D2276-78, and verifying that total particulate contamination is less than 10 mg/ liter when checked in accordance with ASTM-D2276-78, Method A; At least once per 18 months, during shutdown, by:

e.

1)

Subjecting the diesel to an inspection in accordance with procedures prepared in conjunction with its manufacturer's recommendations for this class of standby service; 4

2)

Verifying the generator capability to reject a load of greater than or equal to 785.3 kW while maintaining voltage at 4160 1 416 volts and frequency at 60 2 4.5 Hz; SOUTH TEXAS - UNITS 1 & 2 3/4 8-4

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-1 08 ELECTRICAL POWER SYSTEMS JU RRI1L6t!C EJ EBLIREME!HLLC o nt inued )

3)

Verifying the generator capability to reject a load of 5500 kW without tripping. The generator voltage shall not exceed 5262 volts during and following the load rejection; 4)

Simulating a loss-of-offsite power by itself, and:

a)

Verifying deenergization of the ESF busses and load shedding from the ESF busses, and b)

Verifying the diesel starts,on the auto-start signal within 10 seconds, energizes the auto-connected shutdown loads through the load sequencer and operates for greater than or equal to 5 minutes while its generator is loaded with the shutdown loads.

After energization, the steady-state voltage and frequency of the ESF~ busses shall be maintained at 4160 1 416 volts and 60 1 1.2 Hz during this test.

5)

Verifying that on a Safety Injection test signal, without loss-of-offsite power, the diesel generator starts on the aufo start signal and operates on standby for greater than er equal to 5 i

minutes.

The generator voltage and frequency shall be.4160 1 416 volts ano 60'+ 1.2 Hz within 10 seconds after the auto-start signal; the steady-state generator voltage and frequency shall be maintained within these limits during this test; 6)

Simulating a loss-of-of fsite power in conjunction with a' Safety Injection test signal, and:

a)

Verifying deenergization of the ESF busses and load shedding from the ESF busses; b)

Verifying the diesel starts on the auto-start signal with-in 10 seconds, energizes the auto-connected ESF (accident) loads through the load sequencer and operates for greater than or equal to 5 minutes while its generator is loaded; with the ESF loads. After energization,'the steady-state voltage and frequency'of the ESF busses shall'be maintained at 4160 1 416 volts and 60 i L2 Hz during this test; and c)

Verifying that all automatic diesel generator trips, except engine overspeed, generator different101, and lo'.

r lube oil pressure are automatically bypassed e,pon loss of voltage on the ESF bus concurrent with a Sefety Injection Actuation signal.

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7)

Verifying the standby diesel generator operates for at least:

24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

During the first 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months of this test,.the diesel SOUTH 1EXA5 Uti1TS 1 & 2 3/4 8-5'

n ELECTRICAL POWER SYSTEMS SLLRY.EI LLMCf_R EWJ REM DJI5lCmtin. sed]

l generator shall be loaded to greater than or equal to 5935 kW*

and during the remaining 22 hours2.546296e-4 days 0.00611 hours 3.637566e-5 weeks 8.371e-6 months of this test, the diesel generator shall be loaded to greater than or equal to 5500 kW.

The generator voltage and frequency shall be 4160 + 416 volts and 60 + 1.2 Hz within 10 seconds after the start signal; the steady-state generator voltage and frequency shall be mr;) ;ained-within these limits during this test. Within 5 minutes v,er com--

pleting this 24-hour test, perform Specification $1.oJ. tab)b);**

R

..C 8)

Verifying that the auto-connected loads to 'each standby diesel generator do not exceed the 2000-hour rating of 5935 kW; 9)

Verifying the standby o.nel generator's capability to:

a)

Synchronize with the offsite power source while the generator is loaded with its ESF ioads upon a simulated restoration of offsite power, b)

Transfer its loads to the offsite power source, and c)

Be restored to its standby status.

10) Verifying that with the standby diesel generator operating in a test mode, connected to its bus, a simulated Safety Injection signal overrides the test mode by: (1) returning the diesel gen-erator to standby operation, and (2)~autome,ically energizing the ESF loads with offsite power;

11) Verifying that the automatic load sequence timer is.0PERABLE with the first sequenced load verified to be loaded between 1.0 second and 1.6 seconds, and all ot.her load blocks within

+ 10% of its design interval;

12) Verifying that the standby diesel generator emergency stop lock-out feature prevents diesel generator starting; and

1f future load conditions exceed the 2000-hour rating (5935 kW) of the diesel generator, the diesel generator will be tested at the 2-hour rating (6050 kW) thereaft g,f,p

- If Specification,.v...2.a.Qb, is not satisfactorily completed, it is r:ot necessary to repeat the preceding 24-hour test.

Instead, the standby diesel generator may be operated at 5500 kW for I har or until operating temperature

~has stabilized.

.,2 A o v $h,

-SOUTH TEXAS - UNITS 1 & 2 3/4 8-6

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5 ELECTRICAL POWER 5YSTEMS_

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- 51LR3ElLL 6EElEQUlREMEUIE_1Continutd)

Demonstrating the OPERABILITY of the automatic load shed bypass

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.and the manual load shed reinstatement features of the load sequencer.

At.least once per 10 years or after any modification's which could-f.

affect standby diesel generator interdependence by starting all.

standby diesel generators simultaneously,.during shutdown, and verifying that all standby diesel' generators accelerate to at.least t

600 rpm in less than or equal to 10 seconds; and At least once per 10 years by:

g.

Draining each' fuel tank, removing the_ accumulated ~ sediment and.

1) cleaning the tank using a sodium hypochlorite solution, or equivalent, and Performing a pressure test of-those portions of the diesel fuel 2) oil system designed to Section III, subsection ND of the ASME Code at a test pressure equal to 110% of the system design pressure.

Reports - All standby diesel generator failures, valid or nonvalid,

4. 8. 3.1. 3 shall be reported to the Commission in a Special Report pursuant to Specifica-Reports of standby diesel generator' failures shall tion 6.9.2 within 30 days.

include the information recommended in' Regulatory Position C.3.b of Regulatory.

If the number of failures in the last Guide 1.108, Revision 1, August 1977.

100 valid tests (on a per nuclear unit basis) is_ greater than or equal'to 7, the report shall be supplemented to include the additional information recom-mended in Regulatory Position C.3 b of Regulatory Guide 1,108, Revision 1, August 1977.

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.i SOUTH TEXA5 - UNITS 1 & 2 3/4 8-7

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Table 4.8-1 DIESEL GENERATOR TEST SCHEDULE NUMBER OF FAILURES IN NUMBER OF FAILURES IN LAST 20 VALID TESTS

LAST 100 VALID TESTS

TEST FREQUENCY

$1 54 Once per 31 days 1 2**

15 Once per 7 days t

Criteria for determining number of failures and r4 umber of. valid tests shall-be in accordance with Regulatory Position C.2.e cf F:egulatory Guide 1.108, but determined on a per diesel generator basis.

For the purpose.of determining the required test frequency, the previous test failure count may~ be reduced to zero if a complete diesel overhaul to like-new condition is completed, provided that.the overhaul, including appropriate post-maintenance operation and testing, is specifically approved by the manu-facturer and if acceptable. reliability has been demonstrated. The reliability criterion shall be the successful completion of:14 consecutive tests in a-

.: single series.~ Ten of these tests shall be in accordance with the routine.

Surveillance Requirements 4.8.1.1.2.a.2 and 4.8.1.1.2.a.3 and.four tests in; accordance with the 184-day testing requirement of Surveillance Requirements.

4. 8.1.1. 2. a. 2 and' 4. 8.1.1. 2. a. 3. - If this criterien is not' satisfied during i

theLfirst series of tests, any alternate criterion to be used to transvalue the~ failure count tol zero-requires NRC approval.

- The ' associated test frequency shall. be maintained until seven consecutive failure free demands have been performed and the numberLof failures in the last ;20~ valid demands has been reduced to one.

SOUTH TEXAS - UNITL1 & 2 3/4 8-8

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ML20058D157

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