ML18040A784

Forwards Response to 850723 Request for Addl Info in Support of Tech Spec Exemption to Allow Diesel Generator Removal from Svc for 60 Days. Design Criteria,500 Kv Steel Pole Structure Transmission Lines, Encl

ML18040A784
Person / Time
Site:	Susquehanna
Issue date:	08/07/1985
From:	Curtis N PENNSYLVANIA POWER & LIGHT CO.
To:	Butler W Office of Nuclear Reactor Regulation
Shared Package
ML17139D084	List: ML17139D083 ML18040A784
References
PLA-2514, NUDOCS 8508120264
Download: ML18040A784 (17)

Text

REGULATOL&INFORNATION DISTRIBUTION AUSTEN (RIBS)

ACCESSION NBR: 6508120264 'OC ~ DATE E 8$ /06/07 NOTARIZED: NO DOCKET FACIL:SO 387 Susquehanna Steam Electric Stations Unit 1E Pennsylva 05000387 50>>386 Susquehanna Steam Electric Stationi Unit 2E Pennsylva 05000388 AUTH. NAME AUTHOR AFFII IATION CURTISE N, 8 ~ Pennsylvania Power 8 Light Co.

REC IP ~ NAME RECIPIENT AFFILIATION BUTLERgH ~ RE Licensing Branch 2

SUBJECT:

Forwards response to 850723 request for addi info in support of Tech Spec exemption to allow diesel generator removal from svc for 60 days, "Design CriteriaE500 kY Steel Pole Structure Transmission Lines'" encl' DISTRIBUTION CODE i AQ0 ID TITLE: OR COPIES RECEIVED:LTR Submittal: General Distribution / ENCL g SIZE: I+~ g~>

NOTES: 1cy NMSS/FCAF/PM'PDR 2cys Transcripts ~ 0S000387 OL 07/17/82 o

1cy NMSS/FCAF/PM. LPDR 2cys Transcripts, 05000366 OL:03/23/84 5,~RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL NRR LB2 BC 01 7 7 INTERNAL: ACRS 09 6 6 ADM/LFMB 0 ELO/HDS4 1 0 NRR/OE/MTEB 1 NRR/DL DIR 1 NRR/OL/GRAB 0 NRR/DL/TSRG 1 1 N I/METB 1 NRR/DSI/RAB 1 1 1 RGNl 1 1 EXTERNAL: 24X 1 1 EGLG BRUSKEES LPOR 03 2 NRC PDR 02 NSIC 05 1 1 NOTES:

TOTAL NUMBER OF COPIES REQUIRED: LTTR 32 ENCL 29

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Power 8 Light Company Two North Ninth Street ~ Allentown, PA 18101 ~ 215 i 770.5151 Norman W. Curtis Vice President-Engineering 8 Construction-Nuclear 215/770-7501 AUG 07 1985 Director of Nuclear Reactor Regulation Attention: Dr. W. R. Butler, Chief Licensing Branch No. 2 Division of Licensing U.S. Nuclear Regulatory Commission Washington, DC 20555 SUSQUEHANNA STEAM ELECTRIC STATION ADDITIONAL INFORMATION FOR PROPOSED AMENDMENT NO. 58 TO NPF-14 AND PROPOSED AMENDMENT NO. 13 TO NPF-22 ER 100450/100508 FILE 841-8 Docket Nos. 50-387 PLA-2514 50-388

Dear Dr. Butler:

On July 23, 1985 PP&L met with members of your Staff to discuss our request for a one time Technical Specification exemption which would allow the diesel generators to be removed from service, one at a time,.for an accumulated period of 60 days.

In response to requests made during that meeting, the attached document provides the following information:

o Overview of the Offsite Power Sources and a Portion of the Internal Electric Distribution to Susquehanna SES o Comparison Table of an existing Susquehanna diesel generator and the new fifth diesel generator.

o A write-up (including copies of some slides used in the July 23 meeting) which walks through the tie-in of the fifth diesel.

o A report entitled "Design Criteria 500kV Steel Pole Structure Transmistion Lines" o Appendices A thru D which are the supporting calculations for the Probabilistic Evaluation presented previously in PLA-2346, dated December 21, 1984. Please note these calculations are conservative and do not consider Station Blackout procedures or calculations.

o A letter which evaluates the frequency of loss of off-site power at Susquehanna SES.

F'DR 8508120264 850807 PDR ADQCK 05000387 W >) poY

Page 2 SSES PLA-2514 g,gGg 7 1985 ER 100450/ Pile 841-8 100508 Dr. W. R. Butler In addition to the above information a question was raised regarding procedures to be utilized in performing the LCO work. Those procedures will be in a final draft form for NRC review and walkdown on August 30, 1985.

We request that this Technical Specification change be approved by November 1, 1985.

If you have any questions, please contact D. J. Walters at (215) 770-7861.

Very truly yours, N. W. Curtis Vice President-Engineering and Construction-Nuclear Attachments cc: M. J. Campagnone USNRC R. H. Jacobs USNRC C. Anderson ,USNRC

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CAPACITY FUEL OIL STORAGE TANK 50,XO GAL. 80,000 GAI .

CApAcITY ORIGINAL DESIGN CALLED FOR 650 GALs SUBSEQUENTLY CHANGED TO 550 GALi G84I:LW

The addition of the "E" diesel generator to the Susquehanna Steam Electric Station results in modifications to the existing on site electrical distribution system and existing control and instrumentation circuits.

ELECTRICAL DISTRIBUTION SYSTEM The SSES on site electrical distribution system is described in Chapter 8.0 of the FSAR. Figure No. 1 represents a simplified single line diagram of the existing on site electrical distribution system. Figure No. 2 indicates the modifications to the on site distribution system and the associated interface between the existing system and the new "E" diesel generator facility.

CONTROL AND INSTRUMENTATION CIRCUITS A simplified elementary diagram representation of a typical control and instrumentation transfer scheme associated with "E" diesel generator facility is shown in Figure No. 3. Figure No."A"4 indicates the typical transfer scheme aligned for diesel generator operation. Figure No. 5 indicates the typical transfer scheme aligned for diesel generator "E" operation.

The physical implementation of the "E", diesel generator tie into the existing diesel generator bays is accomplished in three phases. Phase, A, includes the scope of work which is performed prior to entering a limiting condition of operation. Phase B, includes the scope of work which is performed during a limiting condition of operation. Phase C, which is the final phase, includes the scope of work which is performed to tie-in the "E" diesel generator to the transfer points which were installed during the Phase A activities.

The following description of the three phase implementation is presented in a single bay format since the implementation of the scope of work is analogous for each bay of the existing diesel generator building. The description is divided into the activities associated with the 4.16 kV system and the activities associated with the control and instrumentation system. Bay A was chosen as the basis. The description does not present specific details such as individual conduit runs, mounting of equipment, or subcomponents, etc.

Instead, the description presents the overall concepts.

EXISTING Figure No. 6 represents the existing configuration of the "A" diesel generator. 4.16 kV cables from the "A" generator enter one end of OC520A from the bottom and terminate on bus bar within the cabinet. The bus bar runs the length of OC520A where potential transformers and current transformers are mounted. At the opposite end of OC520A from the generator leads, the bus bifurcates to supply power to the Unit 1 and Unit 2 safety related 4.16 kV buses. Figure No. 6 also depicts a typical control or instrumentation circuit which would contain a signal that originated in the control room and terminated in the diesel generator panel OC521A. The routing of this typical circuit includes raceway which has an existing )unction box or a pull box.

PHASE A The first phase is presented in Figure No. 7. As previously indicated, this phase represents activities which would be accomplished prior to entering a limiting condition of operation.

4.16 kV S stem Two (2) cubicles of switchgear OA510A one (1) circuit breaker are to be insta3.3.ed on elevation 710'9". Four six inch conduits from this new switchgear to OC520A are to be installed. 5 kV cables are to be pulled between OA510A and OC520A with the terminations completed at the OA510A end. Two six inch conduits are to be installed between OA510A and the newly installed duct bank which runs to the "E" diesel generator.

Control and Instrumentation S stem A transfer panel OC512A containing the transfer switches is to be installed on elevation 710'9" adjacent to the 4.16 kV switchgear OA510A.

Cable tray is to be installed below the panel to facilitate cable pulling and entry into the panel. The tray system extends down the west wall of the bay to elevation 660'nd eastward to the East Wall where the new duct banks enter the Bay. Terminal boxes are to be mounted in close proximity to the existing )unction boxes. Conduits are to be partially completed from the )unction boxes to the terminal boxes and from )unction boxes to cable tray. Conduits from the terminal boxes to the cable tray are to be completed. With this physical configuration, cables are to be pulled from the terminal boxes to the transfer panel OC512A and terminated at both ends. Cables are also to be pulled from the transfer panel OC512A to the uncompleted conduit runs between the )unction boxes and the cable tray.

These uncompleted cable pulls are to be terminated at OC512A and coiled in the tray system. The transfer panel OC512A is physically configured so that all of the cables associated with Phase A will terminate on one side of the panel and those cables associated with Phase C will terminate on the opposite side.

Upon completion of Phase A the actual transfer points (i.e., switchgear OA510A and transfer panel OC512A) have been installed but no ties have been established to operating equipment.

PHASE B The second phase is presented in Figure No. 8. This phase represents activities which would be accomplished during a ~limitin conditi.on of

~ceration.

4.16 kV S stem The bus bars in OC520A are to be cut and a section removed. The newly installed 5 kV cables are to be connected to their respective sections of the bus. The single breaker of the switchgear OA510A is to be operable in the cubicle designated for the "A" diesel generator. This configuration permits the power output of the "A" diesel generator to go through the transfer point OA501A and back to OC520A before supplying the Unit 1 and 2 4.16 kV safety related buses.

Control and Instrumentation S stem The conduit runs between the terminal boxes and the junction boxes and between the cable tray system and the )unction boxes are to be completed.

The existing cable running through the )unction box are to be determinated, pulled back to the ]unction box, re-routed through the newly completed conduit(s) to the terminal boxes and reterminated in the terminal boxes. The uncompleted cable pulls from Phase A are to be pulled through the newly completed conduit to the )unction box and through existing conduits to the end device such as OC521A. At the end device, the cable are to be terminated. The transfer switches in OC512A are to be aligned for the "A" diesel generator's operation. This configuration permits a signal to go through the transfer point OC512A prior to becoming part of the "A" diesel generator control and instrumentation system.

Upon completion of Phase B, the existing equipment is connected to the transfer points installed as part of Phase A. Specific alarm circuits are installed and actuated to assure proper alignment of the transfer points.

PHASE C The final phase is presented in Figure No. 9. This phase represents activities which would be accomplished after the limiting condition of operation.

4.16 kV. S stem 5 kV cables are to be pulled between OA510A and the switchgear in the "E" diesel generator building through the six inch conduits installed under Phase A. The cables are to be terminated at both ends.

Control and Instrumentation S stem Control and instrument cables are to be pulled between OC512A and the transfer panel OC512E-A in the "E" diesel generator through the cable tray and conduit system installed under Phase A. The cables are to be terminated at both ends.

At the completion of the final phase, the existing equipment associated with the "A" diesel generator and the new equipment associated with the "E" diesel generator are tied to the transfer points. An alignment circuit at the transfer points in the existing diesel generator building and the new "E" diesel generator facility assures proper alignment of all transfer points.

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