ML20211M653

Forwards Response to RAI Re Room Temp Effects on EDG Operation & Ue Calculation KJ-08,Rev 0,per 970925 & 30 Telcons W/Nrc Re Insp Rept 50-483/97-05.Attachment 4 Re Vendor Environ Qualification Repts Withheld

ML20211M653
Person / Time
Site:	Callaway
Issue date:	10/02/1997
From:	Naslund C UNION ELECTRIC CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20046D880	List: ML20211M653 ML20211M657 ML20266B452
References
50-483-97-05, 50-483-97-5, EA-97-168, ULNRC-3656, NUDOCS 9710150089
Download: ML20211M653 (4)

Text

_ _ _ _ _ _ - _ - _ _ _ _ _ _ _ _ - _ _ - _ _ _ _ _ _ _ - _

Ca!!assiPlant Post Othee Box 620

, tu g us w ,es2sr 9

g ,if[, October 2,1997 m

U. S. Nuclear Regulatory Commission Atta: Document Control Desk Mail Stop PI-137 Washington, DC 20555-0001 ULNRC-3656 Gentlemen:

REQUEST FOR INFORMATION PERTAINING TO ROOM TEMPERATURE EFFECTS ON EMERGENCY DIESEL GENERATOR OPERATION INSPECTION RLIORT NO. 50-483/97005 CALLAWAY PLANT Ref: EA 97-168 dated September 9,1997 ULNRC-3649 dated September 15,1997 This responds to information requested in telephone calls with NRC personnel on September 25 and September 30,1997, pertaining to operation of the Emergency Diesel Gen:rator with the room ventilation fan secured.

The material includ:d in the response as Attachment 4 is considered proprietary by Union Electric and should be with!. eld from public disclosure.

If you have any questions regarding this response, or if additional information is required, please let me know.

d, p ,o .

.t,TLlth h f(4 Very tmly yours, ,

4Q

[DL ;il L g g g ) y P' V ClD. Naslund Manager, NuclearEngineering CDN/ MAR /tmw Attachments: 1) Response to Request for Information

2) UE Calculation KJ-08, Rev. 0 (6 pages)

3) UE Drawing E21005(Q), Rev.18, List of Loads Supplied By Emergency Diesel Generator j g# 3 "J;

, , c, ,

4) Vendor Environmental Qualification Reports 9710150089 971002

, .  !!kk ! !! , ...!

})(k + j ,n befreI[

ULNRC-3656 6 October 2,1997 Page 2 cc: Mr. Ellis W. Merschoff w/1,2,3 Regional Administrator U.S. Nuclear Regulatory Commission Region IV 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011-8064 Senior Resident Inspector w/l t

Callaway Resident Office U.S. Nuclear Regulatory Commission 8201 NRC Road Steedman,MO 65077 '

Mr. Barry C. Westreich w/1,2,3,4 Acting Licensing Project .Mac.oger, Callaway Plant l Office ofNuclear Reactor Regulation U. S. Nuclear Regulatory Commission Mail Stop 13E16 Washington, DC 20555-2738 Manager, Electric Depanment w/l Missouri Public Service Commission PO Box 360 '

Jefferson City, MO 65102 Mr. Thomas A. Baxter w/l Shaw, Pittman, Potts, & Trowbridge 2300 N. Street N.W.

Washington,DC 20037 Manager, Plant Support w/l Wolf Creek Nuclear Operating Corporation PO Box 411 Burlington,KS 66839

Attachment 1 to ULNRC-3656 October 2,1997 Page1 A. Reauest forInformatior What is the effect of the diesel generator room temperature on rated generator output during an event?

Resnonse -

A telecon was held with the Systems Engineuing Supervisor of Coltec Engineering on September 26,1997. He stated for each 10*F increase in room air temperature over the design room air temperature of 122 F, the engine output would have to be derated by 0.7% to establish a new continuous rating.

Since our expected temperature isc was approximately 20'F, the resultant derating would have been 1.4% of the nameplate continuous rating of 6201 KW, yielding a l new continuous output rating of 6114 KW. This exceeds the greatest total safety

! related and non-safety related connected loads of 6030.5 KW' B. Reauest for Information What is the effect of the increased room temperature on the environmental qualification of the emergency diesel generator?

Response

2 As noted in our previous response , Celt's Environmental Qualification Report, M-018-00821-01 rated the emergency diesel generator for 10,512 hours0.00593 days <br />0.142 hours <br />8.465608e-4 weeks <br />1.94816e-4 months <br /> of operation at 137'F (122'F + 15'F margin) and 42 hours4.861111e-4 days <br />0.0117 hours <br />6.944444e-5 weeks <br />1.5981e-5 months <br /> for a temperature of 157'F (142*F +

15 F margin). Subsequently, UE calculation KJ-08, Rev. O was performed to determine the effect on qualified life of components assuming a temperature of 139 F.' The data contained within the vendor qualification report has been reviewed and the expected running time of 10,512 hours0.00593 days <br />0.142 hours <br />8.465608e-4 weeks <br />1.94816e-4 months <br /> was recalculated to account for the 4

1.2*C (2 F) temperature difference between 137 F and 139 F. As stated in calculation KJ-08 Attachment 2, for all Class IE devices that had a calculated life of less than 40 years, the. r: calculated running time for conditions at 139*F ranged from

' E21005(Q), Rev.18 -included as Attachment 3

ULNRC-3649, September 15,1997

' UE Calculation GM-03, Rev. O calculated 139'F would be the steady state temperature reached with the emergency diesel generator operating with the ver.tilation fans secured.

• Emironmental Qualifiestion Calculations are performed in 'C l

1.

Attachment 1 to ULNRC-3656 October 2,1997 Page 2 8989,1 to 9675.4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />. This running time exceeds the required mission time of 720 hours0.00833 days <br />0.2 hours <br />0.00119 weeks <br />2.7396e-4 months <br /> (30 days) by an order of magnitude.

Based on the above, operation of the ventilation supply fan is not required to ensure the emergency diesel generator will supply its required output at 139'F. As stated in our previous response, Callaway does not intend to change the current design basis for operation of the diesel generator ventilation supply fan and will maintain room temperature limits as specified by Technical Specification 16.7.4.

Copies of UE calculation KJ-08, Rev. O and Vendor Environmental Qualification Reports are attached for your information. The Vendor Environmental Qualification Reports were sent only to the Licensing Project Manager due to their size and proprietary nature.

d t