ML17164B017
| ML17164B017 | |
| Person / Time | |
|---|---|
| Site: | Susquehanna  |
| Issue date: | 04/22/1999 |
| From: | Nerses V NRC (Affiliation Not Assigned) |
| To: | NRC (Affiliation Not Assigned) |
| References | |
| TAC-MA4293, TAC-MA4294, NUDOCS 9904280063 | |
| Download: ML17164B017 (7) | |
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April 22, 1999 MEMORANDUMTO: Docket File SUBJECT attached do not convey a formal request for information or represent an NRC staff position.
Docket Nos. 50-387 and 50-388
Attachment:
As stated DISTRIBUTION:
KDocket.Fi~le PUBLIC S. Bajwa V. Nerses Origina1 signed by:
FROM:
Victor Nerses, Senior Project Manager, Section 1
Project Directorate I
Division of Licensing Project Management Office of Nuclear Reactor Regulation SUSQUEHANNA STEAM ELECTRIC STATION, UNITS 1 AND 2, DRAFT REQUEST FOR ADDITIONALINFORMATION, EMERGENCY DIESEL GENERATOR DAYTANKCAPACITY(TAC NOS. MA4293 AND MA4294)
I The attached request for additional information (RAI)was transmitted by facsmile on April6, 1999, to R. Kechline of PP&L, Inc. Review of the RAI would allow the licensee to i
determine and agree upon a schedule to respond to the RAI. This memorandum and the OFFICE NAME DATE PDI-1/PM
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/ 'M9 OFFICIALRECORD COPY DOCUMENT NAIVIE: G:iSUSQWIEMRAI.WPD 9904280063
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MEMORANDUMTO: Docket File FROM:
SUBJECT:
Original signed by Victor Nerses, Senior Project Manager, Section 1
Project Directorate I
Division of Licensing Project Management Office of Nuclear Reactor Regulation SUSQUEHANNA STEAM ELECTRIC STATION, UNITS 1 AND 2, DRAFT REQUEST FOR ADDITIONALINFORMATION, EMERGENCY DIESEL GENERATOR DAYTANKCAPACITY(TAC NOS. MA4293 AND MA4294)
The attached request for additional information (RAI) was transmitted by facsmile on April6, 1999, to R. Kechline of PP8L, Inc. 'Review of the RAI would allow the licensee to determine and agree upon a schedule to respond to the RAI. This memorandum and the attached do not convey a formal request for information or represent an NRC staff position.
Docket Nos. 50-387 and 50-388
Attachment:
As stated DISTRIBUTION:
Docket File PUBLIC S. Bajwa V. Nerses OFFICE NAME DATE PDI-1/PM Wr 8.(cc
/ 099 OFFICIALRECORD COPY DOCUMENT NAME: G:FSUSQNEMRAI.WPD
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 April 22, 1999 MEMORANDUMTO: Docket File FROM:
'~'Victor Nerses, Senior Project Manager, Section 1
Project Directorate I
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Division of Licensing Project Management Office of Nuclear Reactor Regulation
SUBJECT:
SUSQUEHANNA STEAM ELECTRIC STATION, UNITS 1 AND 2, DRAFT REQUEST FOR ADDITIONALINFORMATION, EMERGENCY DIESEL GENERATOR D'AYTANKCAPACITY(TAC NOS. MA4293 AND MA4294)
The attached request for additional information (RAI)was transmitted by facsmile on April6, 1999, to R. Kechline of PP&L, Inc. Review of the RAI would allow the licensee to determine and agree upon a schedule to respond to the RAI. This memorandum and the attached do not convey a formal request for information or represent an NRC staff position.
Docket Nos. 50-387 and 50-388
Attachment:
As stated
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/-'EQ T FOR ADDITIONALINFORMA FOR TECHNICALSPECIFICATION CHANGE REQUEST RELATEDTO EMERGENCY DIESEL GENERATOR DAYTANKCAPACITY SUSQUEHANNA STEAM ELECTRIC STATION, UNITS 1 AND 2 DOCKET NOS. 50-387 AND 50-388 1.0 Each day tank for EDGs A, B, C and D has a capacity of 550-gallon. The day tank for EDG E has a capacity of 650-gallon.
In April 1991, Pennsylvania Power and Light Company (PP&L) performed an engineering study (SEA-ME-332) in response to the staff's concerns identified during an Emergency Diesel Safety Function Inspection (EDSFI) regarding day tank minimum volume requirement calculations.
Results of the engineering study indicate that in order to satisfy the requirements described in ANSI N195-1976, a minimum of 461'allons are required to be maintained in each of the day tanks for EDGs A, B, C and D and 528'allons for EDG E.
In page 3 of Attachment 1 to the submittal dated November 20, 1998 (PLA-5007), PP&L stated that the day tank design is capable of supporting only 55.6 minutes of operation at continuous rated loads for EDGs A, B, C and D and 62 minutes for EDG E without automatic refill. Please provide the information:
at Describe the day tank design in detail (including drawings) to demonstrate why it is only capable of supporting 55.6 minutes of operation at continuous rated loads for EDGs A, B, C and D and 62 minutes for EDG E without automatic refill.
b.
What are the corresponding day tank volumes (gallons) for the above 55.6 minutes of operation at continuous rated loads for EDGs A, B, C and D and 62 minutes for EDG E?
c.
What are the set points for the day tank volume high levels (levels at which the fuel oil transfer pumps willstop)?
2.0 The proposed changes to the Technical Specifications (TS) of both units would allow increases in the minimum volume of fuel oil to be stored in the day tanks from 325 gallons to 420gallons for EDGs A, B, C and D and from 325 gallons to 425 gallons for EDG E. In page1 of Attachment 2 to Based on SEA-ME-332, fuel oil consumption for EDGs A, B, C and D is (461l66) approximate 6.985 gpm.
Based on SEA-ME-332, fuel oil consumption for EDGs E is (528/66) approximate 8.0 gpm.
Attachtelt
0 p-A-F T PLA-5007, PP&L stated that these proposed minimum volumes of fuel oil correspond to the tank volumes at which automatic refilloccurs and provide 55 minutes of operation for EDGs A, B, C and D and 62 minutes of operation for EDG'E at continuous rated loads.
Using the fuel oil consumption rate as indicated in Footnotes 1 and 2, the staff finds that 420 gallons'of fuel oil willbe able to support (420/6.985) 60.12 (not 55) minutes of operation for EDGs A, B, C and D and (425/8) 53.12 (not 62) minutes of operation for EDG E at continuous rated loads.
Please provide detail
'iscussions to clarifythese discrepancies.
3.0 In page 1 of Attachment 1 and page 1 of Attachment 2 to PLA-5007, PP&L stated that the proposed volumes (420gallons for EDGs A, B, C and D and 425 gallons for EDG E) are sufficient to operate the EDGs for a minimum of 55 minutes at 100/o of the EDG continuous rated load, and are equivalent to the levels at which fuel oil is automatically replenished.
In page 3 of Attachment 1 to PLA-5007, PP&L stated that all EDG day tanks are automatically refilled when the day tank level drops to a level that will support 55.6 minutes of operation for EDGs A, B, C and D and 62 minutes of operation for EDG E at continuous rated loads.
Please provide detail discussions to clarifythe above inconsistences.
In addition, for each of the following EDG operating times, provide the corresponding day tank fuel oil volumes:
a.
55.6 minutes of operation for EDGs A, B, C and D.
b.
62 minutes of operation for EDG E.
c.
55 minutes of operation for EDGs A, B, C, D and E.