ML20141M076

License Amend Request 91-10 to License NPF-86,changing TSs Re Decoupling of Loss of Offsite Power/Safety Injection Test from 24 H DG Surveillance Run

ML20141M076
Person / Time
Site:	Seabrook
Issue date:	03/20/1992
From:	Feigenbaum T PUBLIC SERVICE CO. OF NEW HAMPSHIRE
To:
Shared Package
ML20141M074	List: ML20141M073 ML20141M076 ML20141M078
References
NUDOCS 9203310288
Download: ML20141M076 (4)

Text

.- -. . _ _ - - . .

~- g- SEABROOK STATION UNIT 1 Now Hampshiro Yankee

_m___ a Facility Operating Licenso NPF 86 Docket No. 50 443 Liconso Amendment Roquest No. 9110 Decoupling_ of the Loss of Ottalte PoWor/Safot'r injection Test From the 24 Hour Diesel Generator Survoillance Run t

This License Amendment Roquest is submitted by New Hampshiro Yankee pursuant to 10 CFR50.90. The following information is enclosed in support of this License Amendment Roquest:

. Section 1 -

Introduction and Description of Proposed Changos

. Section 11 - Markup of Proposed ChanDos

. Section lli - Rotype of Proposed Changes

.Section IV - Sefoty Evaluation of Proposed Changos

.Section V - Determination of Significant Hazards for Proposed Changes

.Section VI -

Proposed Schedulo for Licenso Amendment issuanco and Effectivonoss

. Section Vil -

Environmental Impact Assessment Sworn and Subscribed to before me this

,Rof/ day of //fhM ,1992 , ,

A-f6M C4^ ~

Gkgfi/M ,b/ W3I4 Ted'C/elgenbaum

[ffotary Public ,

Prealdent and Chief Executive Officer ta w .

.a L,g v ., i tja 92o3310280 920320 PDR ADOCK 05000443 F PDR

i I

e

. l 1, hiami,jnJ.jas,Lynd liesLthjhp of Prooo>eil Cbynn3. [

J A. Introduction -

J l The purpose of the proposed Tnhnical Specification change is to sevise Technit al Specification 3/4.8.1 'A.C. Sou ces" to separate the Loss of Olisite Pow e r /S alct y (

injection (l.OP/SI) test frora the 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> diesel generator surseillance run. The

purpose of the LOP /S! surteillance is to demonstante that the diesel generator oill ,

start, energi/c the einergency. busses, and sequence on safety injection required loads following a loss of offsite power coincident with a salcty injection actuation. The hot nestart capability of the diesel generator is demonst ated by acquiring the diesel  :

generator to be at normal operating temperature prior so the start of the sutveillance. l The NitC has previously seviewed and approved similar testing changes at other plants t (e.g., Grand Gulf Nucleus Station, Unit 1 Amendment No. 52 to License No. NPP49;

- itiver llend Station, Unit 1, Amendment No. 43 to 1.icense No. NPF.47; and Virgil C '

Summer Nuclear Station Und 1, Amendment No. 94 to 1.icense No. NPP 12).

As presently _ waitten Technical Specification Su r s eillanc e lleq uir eme nt 4 A 1.1 2f.7 requires the LOP /Si test to be perfortued within $ minutes of completing the 24 hout diesel generator surveillance sun. This requirement is derived from llegulatory Guide r 1.108, Pc_rlodle Testine _ of 111esel Generator LinittL,J),syd n> Onsite-_ Ilul.rle Pou er

)fpgm_s; nt _ Ngghpr Power Plants. The current Technical Spe(ification requiremeur creates significant schedu!ing demands during an ouhge by reducing schedule flexibility and unnecessarily canktraining outage activities. Due to the current requirements of Surveillance ~1tequirement 4 A1.1.2f.7. it would not be prudent during an outage to ,

uttempt the 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> tun of the diesel generator until all of the diesel generator design loads are operable and capable of satisfying the requirements of the I.OP/S! lest.

Since all of these loads are not typically operable until near tne end of the outage. the perfo mance of Surveillance Requirement 4AL1.2f.7 is forced to occur as a critical path item. If these tests are separated, the 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> diesel generator run may be performed earlier in the outage in parallel with critical path activities. New llampshire ,

Yankee (NilY) believes that the proposed Technical Specification change satisfies the intent of Ilegulutory Guide LIOS as discussed below.

Regulatory Guide 1.108 Position C.2.a(5), which is the basis for the requirement to perform the LOP /SI test immediately after the diesel generator 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> test states that the purpose of the requirement is im " demonstrate functional capability at full load temperature conditions' Decoupling the two tests does not invalidate or reduce the effectiveness of either test, provided full load temperature conditions are achieved prior to perforrning the LOP /S! test.

To. ensure that the intent of Regulatory Guide 1.108 Porition C.2.a($) is met, a requirement to operate the diesel generator loaded to greater than or equal to 6083

- kW for at least 60 minutes has been included in the proposed Technical Specification change. This requirement will be satisfied prior to performance of the LOl/SI test The concept of separating the LOP /SI test from the diesel generator 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> run is acknowledged in the existing Seabrook Station Technical Specifications. The note at the bottom of page 3/4 8 7 states: *1f Specification 4X Lt.2f.6)b) is not sutisfactorily I

completed, it is-not necessary to repeat the preceding 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> test, instead the diesel i

l 1 I

--~,cy-~w-,,,,-.emw y-,m, n p .m,,%,.w,wm#w.,%,.,..e.,,c,,,3--..c,-n.,-__m,,,m-r_,m,.,.,.n..mpw--.rweg.,e-,-,,,wms,y_,,.,.,+,,,.,r.,,,e,,.-ym._,_.i.--,.,,_.y--,_,,-,%,--,.1

- - -_ _ . . ~ . . - . - _ - - . - - - . . . - - - . _ _ . - . - . _ _

i l

generator rnay be operated at 6083 kW for I hour or until operuting, temperature has stabillied' Specification 4,8.1.L2f 6)b) is the LOP /SI test 4 11 is citar f rom the current I Technical Specificalmus that the actual required prerequisite for the Lor /SI test ir. that i the diesel generator be at its normal operating temperature.

New ilampshire Ynnkee has substantial experience operating the diesel generators and  ;

the operating history confirms that normal operating temperatures will be reached following a 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> run when the diesel generator is loaded to at least 0083 kW. This ,

has been verified by NilY through a review of diesel generator monthly Technical i Specification r.urveillance data. The manufacturer of the Seabrook Station diesel 4 generuur, Colt industries, has also documented by letter to NilY that operation af the diesel generator for at least one hour at a load of 6083 kW should establish stable operating temperatures. .

1 (L Description of Changes The following changes are proposed to Trehnical Specification 3/411: -

3

1. S U R Vlill.LA NCli iti!OUliti!Ml!NT 4 A 1.1.2f.6)b). This Surveillance llequirement is resised to require that the I.Ol'/S! lest be conducted within 5 minutes of operating the diesel generator at greater .than or equal to 6083 kW ,

for at least_60 rninutes. This proposed surveillance requirement ensures that the intent of Regulatory Guide L108 is met by serifying the diesel generator is at normal operating temperature prior to the initiation of the LOP /S! test.

2. SURVlilLLANCII RIIOUIRIIM1!NT 41Lt.2f.7). The last sentence is deleted since the requirement to perform the LOP /SI test within 5 minutes of completinh the diesel generator 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> run has been revised. The new requirement is to ,

run the dietel generator at greater than or equal to 6083' kW for at least 60 3 minutes prior to starting the LOP /SI test and is contained in Surveillance Requirement 4A LL2f.6)b). In addition, the footnote at the bottom of page 3/4 8-7 is applicable to the sentence on this page which is deleted, therefore it is deleted. The requirements contained in the footnote are incorporated into the proposed change to Surveillance Requirement 41LL2f,6)h). Since the operating historf of the diesel generators indicate that normal operating temperatures will be reached following a 60 minute run at greater that, or equal to 6083 kW, the statement *or until operating temperature has stabiliicd* is deleted. Removing "

this statement _will enhance the clarity of the Surveillance Requirement.

+

I 2

y. ye,+..,, .- er. .,_ .

w w ., .,...,,s.n.o,_,.- -<m.,w -,w_ . ~

m=,&- gm ehe,4.-h.4p1J E A Ah 3.i- , E m J A445 4 We 8 4 4 r.*'* S. M.l.4- - - " 'h.MAAks# 4, or*4hJD-^A4- E-4.>4.m-2k4.Mhe,*r-C W 4 4 -- hha-,---.s,A, ,&.. ne w h # Ah4 h

I

$ b

~g.

11. MarLuni of Pruniond Chiiru

• l f

See attached markup of proposed changes to Technical Specifications.  !

i l

i I

e i

p

?

I b

P g

f i

9 Y

?

t I

5 4

e' h

i f

I 1.

lf -^

k 3  ;

e v+ w - -v- cr-s- -, vv ,wg, ,-,-w,1-yv-w-v,,-w, - , - - - - - ,~yw, ,e,,y-r%%+~,-w--wr.$. ew *+W-r w-"f *'ew ' ~ r"