ML20094N380

Forwards Response to NRC 920220 Request That Util Provide Response to Six Recommendations in Safety Evaluation for Station Blackout Rule (10CFR50.62).EDG Reliability Program Implemented Per Reg Guide 1.555,Section 1.2

ML20094N380
Person / Time
Site:	Davis Besse
Issue date:	03/31/1992
From:	Shelton D CENTERIOR ENERGY
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
RTR-REGGD-01.555, RTR-REGGD-1.555 2033, TAC-M68536, NUDOCS 9204060322
Download: ML20094N380 (3)

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4 CENTERIOR ENERGY Doreld C. Shelton 300 iMwi Avenue Vce Prewsd Nxkar IW30. OH 43%20001 DavsBesse (419)249 23 7) r Docket thimbe r 50- 3 4 t>

License ilumber larF-3 Serial fiumber 2033 March 31, 1992 United St at es fluelear Regulat ory Commiss ion Document Centrol Desh Washington, DC 2055$

Subject:

Safety Evaluntlen of the Davin.Eesse !1uclear Power Statlon, Unit flumbet

1. Station Blackout Rule 10 CFR 50.03 (TAC

' lumber !!68536)

Cen t lernen By letter dated February 20, 1992 (Log flumber 3682), t he fluelear Regulatory Conunisslor: (110 0 ) tequested that Toledo Edison (TE) provide additional iniotmat ion regat ding act ionn to be taken t o implement the Stat ion Blackout (SBO) Rule (10 CFR 50.63).

Specifically, the llRC tequested that TE provide a response to six recommendat ions inade by the staff in TE's Safety Evaluation (SE) for SB0 Rule compliance dated 11a rch 7, 1991 (Log flumber 3421).

The at tachment to this lettet provides the requested information.

Should you have any additlenni questions or comment s regarding this issue, please contact Itr.

R. W.

Schtauder, !!anager - fluclear Licensing, at (419) 249-230t>.

Very t ru y youra,

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NKP Attachment cci A. B. Davin, Regional Administ rator, llRC Region III J. B. Hopkins, flRC/IlRR DE-1 Seniot Project flanager W. Levis, llRC Senior Resident Inspector Utility Radiological Safety Loard 9204060322 k20333 DR ADDCK 05000346 h1 PDH s

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Docket 11 umber 50-340 hicense liumber 11PF.3 Serial fiumber 2033 At t achment Page 1 RESP 0!JSE TO REcol!!!EllDATIOll5 FROH DAVIS.BESSE 1

UllIT 1 STAT 1011 BLACROU1 RULE 11RC UAFETY EVALUAT10ll REPORT R ec onenend a t i on 1 :

The capacity (KWs) of the proposed AAC power nource i

(diesel generator) should have approximately the same capacity (RWo) as one of the existing EDGs.

If the proposed AAC power source has less capacity, then the 1icensee should perform a coping analysis which shows that the plant can cope wit h and s ecover f rom a St ation Blackout (SBO) for the required duration.

Such an analysis should be included in the document at ion suppot t ing the SB0 nubmittals that in to be snaintained by the licensee.

Resp nse:

The capacity of the Station Blackout Diesel Genetator tSRODC) is 2865 RW.

The capacity of each existing Emer gency Die 6el l

Generator (EDG) is 2600 RW.

Since the SBODG capacity in langet than the capacity of the EDGs, no coping analysis lu necessaty.

Recommwndat4cn 2 _ The licensee should ensure that the -bat t ery char get ansociat ed wit h the batt et y supplying SB0 loads is powered f r om t he AAC power source during-the 500.

, Response The battery changets tequired to supply loads during a SD0 ate powered from essential 41bOV bus D1.

Bus D1 will be powered by the SEODO t ht uugh~ non. essential 4160V bun D2 in the event of a 500.

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Rec ommendat ion 3 :

The licenser should ensure that t he en. at gency

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i inottument alt compressor 18 powered it em the proposed AAC power source or show that compressed alt is not required during an 5B0 event.

Response

The emergency insttument air compressoc is powered from 480V bus F7. which in fed itom 4160V bus D2, Bus D2 in the electrical bus that is fed by the SBODG, Thus, the emergency instrument alt comptessor can be powered by the SBODG during a SBO. If needed.

.Reconenenda t ion 4,53, _ The-licensee _should include a full description.

including the nature and objectives of all modifications necesnary for compliance with 10 CFR 50.03 in the documentation suppot ting the 500 to 1e maintained by the licensee.

submittals that is Pespong :

The only modificntion equited fot SB0 Rule (10 CFR 50.63) rcompliance is the installation of the_SBODG as__ described in TE's leuer of April 17._1989 (Setlal Ilumber 1051).

The SBODG han been installed and -is current ly under going pre. operational test ing.

Pre-operat ional t est ing will be completed prior to completion of the eighth refueling outage, curtently scheduled for the Spring of 1993.

Documentation supporting this modification is maintained by TE in f

accordance wit h the exist ing Quality Assurance Pt ogram.

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License 11 umber flPF.3 j - '

feilal 11umbet 2033 Attachment j

. l' age 2 Reconynendat len 5:

The licet:9ee should (molement att EDG teliabillty ptogram which.ueets the guidance of Regulatoty Guide 1.155, Section 1.2, _ If on EDG t eliabilit y progratn cutiently exist s, the progian should tw evaluated and ad)ttsteJ in accotdance with Regulat ory Guide 1.155.

Confirmat ion t hat such a ptogtam it, its place or will be implement ed should be included in t he document at ion support ing t he S!!O iubmit t als t hat is to be maintained by the licensee, liefron ne s An EDG t eliabilit y pt ogram in accordance wit h flUllARG 8 7-00, l

Apperlix D ha9 been implemented at Da v i s -Ite s s e, Unit 1.

1his program j

meets the intent of the guidance of Regulatory Guide 1.155. Dertion 1.2.

Reconenendat ion 6:

The licennee should verify that the S110 equipment is coveted by an appt'opriet e QA pt ogr am consistent wit h t he guidance of Regulatoty Guide 1,135.

Futther, this evaluition should be documented as patt of the pa(kage suppotting the S110 tule response,

Response

The SEODG ond au*ociated components have been locorpotated into TE's exist ing Qualit y Assut ance Program.

The equipment dit ect ly needed to ensure operation of the SEODG was purchaued an non-sniety related and has been classified as Augmented Quality (AQ).

1he quality t equir ement s applied du Ing the manuf act ut e, installation, and test ing ate defined by Regulat oty Guide 1.155, Appendix A.

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