ML20210H087

Proposed Tech Specs Changing TS 3.8.1, AC Sources Operating. Removal of Accelerated Testing Requirements for Standby DGs as Advised by GL 94-01

ML20210H087
Person / Time
Site:	Grand Gulf
Issue date:	08/06/1997
From:	ENTERGY OPERATIONS, INC.
To:
Shared Package
ML20210H080	List: ML20210H077 ML20210H087
References
GL-94-01, GL-94-1, NUDOCS 9708110223
Download: ML20210H087 (8)

Text

. .,

i ATTACHMENT 3 Marked-up TS'Pages 9708110223 97 PDR ADOCK 0 416 P PDR .a

AC Sources-Operating 3.8.1 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TINE H. Three or more required H.1 Enter LCO 3.0.3. Imediately AC sources increrable.

SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.8.1.1 Verify correct breaker alignment and 7 days indicated power availability for each required offsite circuit.

SR 3.8.1.2 -- - -- - --- - NOTE. -- -- -- - --

All DG starts may be preceded by an engine prelube period and followed by a warmup period prior to loading.

Verify each DG starts from standby f d conditions and achieves, in s 10 seconds, 3..

voltage = 3744 Y and s 4576 Y and frequency /

k 58.8 Hz and :s 61.2 Hz. 3l g (continued)

GRAND GULF- 3.8 5 Amendment No. 120

l AC Sources-Operatin 3.8.

SURVEILLANCE REQUIREMENTS (continued) j

SURVEILLANCE FREQUENCY l SR 3.8.1.3 - -- NOTES - - -- -- --

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 ,

imediately follow, without shutdown, a successful performance of SR 3.8.1.2.

Verify each DG operates for a 60 minutes at A sp i ed '

a load a 5450 kW and s 5740 kW for DG 11- ab 3 . 1 and DG 12, and a 3300 kW for DG 13.

SIks .

SR 3.8.1.4 . Verify each DG day tank contains k 220 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.

SR 3.8.1. 7 - Verify the load shedding and-sequencing 31 days panels respond within design criterla.

(continued)

GRAND GULF 3.8 6 Amendment No. 120 i

p - y*- -e -. p-c.ywm.e ,g-e Tp'-gw->

AC Sources-Operatin ,

3.8.

x

[/ / /

m

/

Table 3.8.1,l(page1of1 Die'sel Generator Test Sche,dule

/ /

/ ,

NUMBEROFFAl(URES / / / / /

/IN LAST 25 VAL 10/TESTS

, , , (4) /

JREQUENCY ,/

3 1 days

=4 7 day ) (but 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />)

/

(a) Citeriafordeteriningnumbero failures and valid tests shall,be in / / /

ccordance with gulatory Posijdon C.2.e  ;

Revisipn 1, wh athenumberoftestsand,ofRegulatoryGuide1.108, failures'is determined on a >

b) per DQ basis.

Thi! test f equency shall be maintai sd until seven consecitive failure '/ /

! run test's have been fr,4e sta i from standby conditions and load and perform . If, subsequent to the 7 failure' free tests ( l or more' additi al failures occdr such thft there,tre again 4'or more failures in t last 25 tests.fthe testing interval shall agn'in be reduced as not d above and maintained until 7 consicutive failure free , tests have

, b n performed.

II Yafje 3, W, l ~ / kOS L un 6l 6

• GRAND GULF 3.8-17 Amendment No. 120

!.*, AC Sources-Operating  !

B 3.8.1  !

BASES

r

SURVEILLANCE SR 3.8.1.2  :

REQUIREMENTS

! (continued) This SR helps to ensure the availability of the standby i electrical power supply to mitigate DBAs and transients and -

maintain the unit in a safe shutdown condition.

l To minimize the wear on moving parts that do not get lubricated when the engine is not running, this SR is i modified by a Note to' indicate that all DG starts for this Surveillance may be preceded by an engine prelube period and followed by a warmup period prior to loading.

l For the purposes of this testing, the DGs are started from ,

standby conditions. Standby conditions for a DG mean that t

the diesel engine coolant and oil are being continuously

circulated and temprature is being maintained consistent i with manufacturer recommendations for DG 11 and DG 12. For DG 13, standby conditions mean that the lube oil is heated

by the jacket water and continuously circulated through a i portion of the system as recommended by the vendor. Engine 1

Jacket water is heated by an immersion heater and circulates

through the system by natural circulation.

SR 3.8.1.2 requires that the DG starts from standby conditions and achieves required voltage and frequency within 10 seconds. The DG's ability to maintain the required voltage and frequency is tested by those SRs which

. require DG loading. The 10 second start requirement

supports the assumptions in the design basis LOCA analysis j

(Ref. 5). ,

l The DGs are started for this test by using one of the following signals: manual, simulated loss of offsite power  :

by itself, simulated loss of offsite power in conjunction-j with an ESF actuation test signal, or an ESF actuation test signal by itself.

J l

The-:: d 31_ av Frequency for SR 3.8.1.2 Qab)4,8.5.F /Mes'eL9tnerAtat2In is s consistHG h the industry guidelines or assessment of

! diesel nerator perfonnance (Ref.14). T5::: Fr:; :::les-

, provid equate assurance of DG OPERABILITY, while minimi ng degradation resulting from testing.

, tad

[_ frepwy (continued)

GRAND GULF B 3.8 15 Revision No. 1 t

j -

AC Sources-Operating B 3.8.1 BASES SURVEILLANCE SR 3.8.1.3 (continued)

REQUIREMENTS Although no power factor requirements are established by this SR, the DG is nonna11y operated at a power factor between 0.9 lagging and 1.0. The 0.9 value is conservative with respect to the design rating of the machine, while 1.0 is an operational limitation to ensure circulating currents are minimized. The load band for DG 11 and 12 is provided to avoid routine overloading of the TDI DG. Routine overloading may result in more frequent teardown inspections in accordance with vendor reconnendations in order to maintain DG OPERABILITY.

The n.Tel= 31 day Frequency for this Surveillance (+w-T ele 3.8.1=l+ is consistent with the industry guidelines for assessment of diesel generator performance (Ref. 14).

Note 1 modifies this Surveillan:e to indicate that diesel engine runs for this Surveillance may include gradual 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.

Note 3 indicates that this Surveillance shall be conducted on only one DG at a time in order to avoid common cause failures that might result from offsite circuit or grid perturbations.

Note 4 stipulates a prerequisite requirement for performance of this SR. A successful DG start must precede this test to credit satisfactory performance.

SR 3.'8.1.4 This SR provides verification that the level of fuel oil in the day tank is at or above the level at which fuel oil is automatically added. The level is expressed as an equivalent volume in gallons, and ensures adequate fuel oil for a minimum of 30 minutes of DG operation at the maximum expected post LOCA load.

(continued)

GRAND GULF B 3.8-16 Revision No. 1

J -

AC Ssurces-Operating

! B 3.8.1 .

i l BASES i SURVEILLANCE SR 3.8.1.20 (continued) j REQUIREMENTS 4

This SR is modified by a Note. The reason for the Note is  !

to minimize wear on the DG during testing. For the purpose i of this testing, the DGs must be started from standby v

conditions, that is, with the engine coolant and oil continuously circuhted and temperature maintained i

consistent with manufacturer recommendations for DG 11 4

and DG 12. For DG 13, standby conditions,mean that the lube i

oil is heated by the jacket water and continuously circulated through a portion of the system as recomunnded by i the vendor. Engine Jacket water is heated by an inumrsion

' heater and circulates through the system by natural circulation.

Die (elGenerator estIchedul4 l e DGf test se edul Tabl!3.8.ly impl ts the j dustry

, guide ines foi ass seenVofdiesel) generar performance /

(Ref 14). i posef6f thi test sch ule is 6 provide /

time y tesyjdata he po establis confide e level associa with the oal t maintain DG eliabili at > 95 per st. >

ccordjgto~heipdustry videline (Ref. unit

) -

should a t ted pt leas onceevey31 days}4),eac- . Wh ver a j has ekperi cod or no e valid f411ures in the) st i 25 /alid t'sts, e the f i 7/ays, our allur 4 inimum 25 timp alid betweep tests is ptests f /ailur 4rateis redug

. pf 0.1 or the thr hold of cceptable DG jerfo ce, a j henc y be/an e y indi ionof/thed,etradat n of

'. reli ility' Wh consid. intheligitof ong h tory [

l of

' only) bests, howeve , 4 robabl4 stati fat dresdiinAho 4st 25 ibuti of alid r domt ts a

' f events. Incr a,s icall sing t test fec cy al

' sa re tipe y

- /ccumu tion faddifional judgep)ntof tc a op whic o base f he re 4 ability of he DG. The i reased test ,

i Freq,u~ency plust aintain~ed til s en-coptecutiv6 fa fure free tes hay en pe o . I i

The Frequene or ac ler ed tjrsting is 7-d.a s, bu no less than 4 hourt. Tests e ductecat}nfervalf,of(1sssthan i 24 Acf. ons. /However, fp tursmaybecrdditedfo[purpostofreestc uired/

ishipd the

normal 31-day eque'cy terval

} n succ4ssfuytesta an f i'

.~ / / / / /

j- -(continued)

GRAND GULF B 3.8 33 Revision No. 1

= . . - . = -

AC Sources-Operating B 3.8.1 BASES-SURVEILLANCE ID[ese/ Gen / rat (rte (Nched'ule (dntin )

REQUIREMENTS / '

/ /

h rs sho 1d beec/

/ le st nt in onsid ed anji valig est and/

towa ds th seve ' consecutive tilure free starfs, nd he onfcutive est ount i not set, e interval n exp s' of day or day , as /

p priite) c stitute.,a allur )

et SRs ape resu s' he ssoci edpGbei dec)(r nopef,abl y It s

/ , ver conttitu

.,d y co ecugive test codnt M et r.eset. /

a valid estA r fai'Iure p the , j -

i

/

3

l. REFERENCES 1. 10 CFR 50, Appendix A, (>DC 17, 4

2. UFSAR, Chapter 8.

3. Regulatory Guide 1.9.

4. lGSAR, Chapter 6.

5. UFSAR, Chapter 15,

6. Regu:atory Guide 1.93.

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

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

9. Regulatory Guide 1.108.

10. Regulatory Guide 1.137.

11. ANSI C84.1, 1982.

12. ASME, Boiler and Pressure Vessel Code,Section XI.

13. IEEE Standard 308.

14. NUMARC 87-00, Revision 1, August 1991.

15. Letter fros'E.G. Adensam to L.F. Dale, dated July 1984.

16. GNRI-96/00151, Amendmenc 124 to the Operating License. I l

)*) Otneril L4 ftw 0 & o l , 5 % ) ?>l y I J t Q GRAND GULF B 3.8-34 Revision No. 2 e m