Text

Proposed Tech Specs 3.8.1 Re A.C. Sources - Operating
	ML20129J423
Person / Time
Site:	River Bend
Issue date:	10/24/1996
From:	; ENTERGY OPERATIONS, INC.
To:	;
Shared Package
ML20129J417	List: ML20129J423; RBG-43243, LAR 96-46 to License NPF-47,changing Tech Spec 3.8.1, A.C. Sources-Operating, Per GL 94-01;
References
	NUDOCS 9611060252
	Download: ML20129J423 (6)
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AC Sources--Operating 3.8.1 l '

1 SURVEILLANCE REQUIREMENTS 5 SURVEILLANCE FREQUENCY !

i SR 3.8.1.1 Verify correct breaker alignment and 7 days i indicated power availability for each required offsite circuit. ;

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SR 3.8.1.2

NOTE--------------------

-All DG starts may be preceded by an engine 1

prelube period and followed by a warmup

period prior to loading.

Verify each DG starts from standby As s cifi in 4 conditions and achieves: T e3 .1-1 I a. For DG 1A and DG 18, steady state 1

voltage a: 3740 V and s 4580 V and 7/c/ctygr .

frequency a: 58.8 Hz and s 61.2 Hz, l in s 10 seconds. ;

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b. For DG IC:

! t j 1. Maximum of 5400 V, and 66.75 Hz, i and

. 2. Steady state voltage a: 3740 V and

l s 4580 V and frequency a: 58.8 Hz

- and s 61.2 Hz, in s 13 seconds. ,

i (continued)

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9611060252 961024 PDR ADOCK 05000458 P pm RIVER BEND 3.8-5 Amendment No. 81

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AC Sources-Operating

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3.8.1 '

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SURVEILLANCE RE00lREMENTS (continued) l SURVEILLANCE FREQUENCY SR 3.8.1.3 -------------

NOTES-------------------

l 1. DG loadings may include gradual loading as recommended by the manufacturer.

2. Momentary transients outside the load range do not invalidate this test.

3. This Surveillance shall be conducted on only one DG at a time.

4. This SR shall be preceded by, and immediately follow, without shutdown, l a successful performance of SR 3.8.1.2.

Verify each DG operates for a 60 minutes spec' ed !

at a load a 3000 kW and s 3100 kW for DG abl .8.1 1A and DG 18, and a 2500 kW and s 2600 kW for DG IC. 7/ f l

SR 3.8.1.4 Verify each day tank contains a 316.3 gal 31 days of fuel oil.

SR 3.8.1.5 Check for and remove accumulated water from 31 days each day tank.

SR 3.8.1.6 Verify the fuel oil transfer system 31 days operates to automatically transfer fuel oil from the storage tank to the day tank.

(continued) l l

RIVER BEND 3.8-6 Amendment No. 81

AC Sources-Operating 1 l

3.8.1 J

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Table 3. 1-1 (page 1 o 1) '

Diesel nerator Test S edule j

/

j I BER OF FAILUR AST 25 VALID TS(a)

[ FREQ NCY 3 31 days

! 24 7 days (b) ut 2 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />) i 1

)

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(a) Criteria for de rmining number of ilures and valid ests shall b in accordance wi Regulatory Positi C.2.e of Regulat ry Guide 1.10 ,

Revision 1, here the number of ests and failures s determined na per DG ba s. l

)

, (b) This t st frequency shall e maintained until even consecut ve failure .

l j free tarts from standby conditions and loa and run tests ave been l t per ormed. If, subse ent to the 7 failur free tests, 1 r more l l a ditional failures cur such that ther are again 4 or ore failures

n the last 25 tes , the testing inte al shall again reduced as I noted above and intained until 7 ce secutive failure free tests have l

been performed. /

i Tab le 1. 9.I- I h<r be.en deleted.

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i RIVE. BEND 3.8-16 Amendment No. 81

AC Sources-Operating B 3.8.1 f

BASES SURVEILLANCE SR 3.8.1.2 (continued)

REQUIREMENTS

The ormal 31 day Frequency _for SR 3.8.1._ (s Ar 44.1-1/ Uter,41 Ge(eratorAest Jched e" is consistent with the industry guidelines for assessment of ,

diesel generator performance 4Ref. M). %e crc q=c-in '

prcvida adequate assurance of DG OPERABILITY, while ;

minimizing degradation resulting from testing.

Qe Nr. l g& fy),jf fregen SR 3.8.1.3 '

?rd Vd65/ \

This Surveillance demonstrates that the DGs are capable of synchronizing and accepting greater than or equal to the !

equivalent of the maximum expected accident loads. A 1 minimum run time of 60 minutes is required to stabilize '

l 4 engine temperatures, while minimizing the time that the DG 4 is connected to the offsite source. l Although no power factor requirements are established by this SR, the DG is normally operated at a power factor l between 0.8 lagging and 1.0. The 0.8 value is the design i rating of the machine, while 1.0 is an operational j limitation to ensure circulating currents are minimized. i The load band is provided to avoid routine overloading of the DG. Routine overloading may result in more frequent teardown inspections in accordance with vendor recommendations in order to maintain DG OPERABILITY. )

1 The7, n :131 day Frequency for this Surveillance 44as.

T d h ? " 1-1).is consistent with the industry guidelines for assessment of diesel generator performance (Ref. 14). I'

% an/15' Note 1 modifies this Surveillance to indicate that diesel ,

engine runs for this Surveillance may include gradual l loading, as recommended by the manufacturer, so that mechanical stress and wear on the diesel engine are minimized.

Note 2 modifies this Surveillance by stating that momentary transients because of changing bus loads do not invalidate this test.

(continued)

RIVER BEND B 3.8-15 Revision No. 0

)

AC Sources-Operating B 3.8.1 BASES -

SURVEILLANCE REQUIREMENTS

[ Diesel Genefator Test ScheduM (continued) The test schedule (T e 3.8.1-1) i ements the ind ry .

gu elines for asses nt of diesel nerator performa e '

ef. 14). The pu ose of this te schedule is to ovide '

timely test data o establish a nfidence level a ociated ,

with the. goal maintain DG r iability at > 0. per test. !

\

According the industry idelines (Ref. 1 , each DG unit :

should b tested at leas once every 31 da . Whenever a has e rienced 4 or e valid failure n the last 25 v id tests, the ximum time betw n tests is red ed to 7 ys. Four fai res in 25 valid sts is a failur rate 0.16, or the reshold of acce able DG perfo nee, and

/hence may be early indicati of the degrada on of DG reliability When considere in the light o a long history of tests, owever. 4 fail s in the last valid tests may only be statistically robable distrib ion of random event . Increasing test Frequenc allows a more timel acc' ulation of ad tional test dat upon which to base ju ment of the liability of th G. The increased est F equency mus e maintained un 1 seven consecutiv failure ree tests ve been perfo .

The Fra ency for accele ted testing is 7 ys, but no less than hours. Tests nducted at interv s of less than 24 urs may.be cre ed for complianc with Required A ions. However for the purpose re-establishing the ormal 31-day equency, a succes ul test at an interv of less than 24 ours should be c sidered an invalid t and not count owards the seven nsecutive failure fr starts, and the onsecutive test nt is not reset. .

At t interval in e ss of 7 days (or 31 ays, as a ropriate) const utes a failure to SRs and resu s n the associat DG being declared i perable. It s not, however, onstitute a valid t or failure o the DG,

@ any con cutive test count i not reset.

REFERENCES 1. 10 CFR 50, Appendix A, GDC 17.

2. USAR, Chapter 8.

3. Regulatory Guide 1.9.

(continued)

RIVER BEND B 3.8-32 Revision No O

." AC Sources-Operating B 3.8.1 BASES REFERENCES 4. USAR, Chapter 6.

(continued)

5. USAR, Chapter 15.

6. Regulatory Guide 1.93.

7. Generic Letter 84-15, July 2, 1984.

8. 10 CFR 50, Appendix A, GDC 18.