BSEP 02-0046, Response to Request for Additional Information Re Request for License Amendments - Extended Power Uprate

Response to Request for Additional Information Re Request for License Amendments - Extended Power Uprate

ML020650239
Person / Time
Site:	Brunswick
Issue date:	02/21/2002
From:	Keenan J Carolina Power & Light Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
BSEP 02-0046, TAC MB2700, TAC MB2701, TSC-2001-09
Download: ML020650239 (7)

Text

SCP&LJohn Vice President S. Keenan AProgress Energy Company Brunswick Nuclear Plant FEB 2 1 2O2 SERIAL" BSEP 02-0046 TSC-2001-09 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 BRUNSWICK STEAM ELECTRIC PLANT, UNIT NOS. 1 AND 2 DOCKET NOS. 50-325 AND 50-324/LICENSE NOS. DPR-71 AND DPR-62 RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION REGARDING REQUEST FOR LICENSE AMENDMENTS - EXTENDED POWER UPRATE (NRC TAC NOS. MB2700 AND MB2701)

Ladies and Gentlemen:

On August 9, 2001 (Serial: BSEP 01-0086), Carolina Power & Light (CP&L) Company requested a revision to the Operating Licenses (OLs) and the Technical Specifications for the Brunswick Steam Electric Plant (BSEP), Units 1 and 2. The proposed license amendments increase the maximum power level authorized by Section 2.C.(1) of OLs DPR-71 and DPR-62 from 2558 megawatts thermal (MWt) to 2923 MWt. Subsequently, on February 13, 2002 (Serial: BSEP 02-0037), CP&L provided a response to a Request for Additional Information (RAI) concerning the containment pressure and temperature analyses performed in support of the BSEP extended power uprate. On February 13, 2002, during a telephone conversation regarding BSEP 02-0037, the NRC requested additional curves associated with the containment pressure and temperature analyses. The response to this RAI is enclosed.

Please refer any questions regarding this submittal to Mr. Leonard R. Belier, Manager - Regulatory Affairs, at (910) 457-2073.

Sincerely, 2n S. Ke enan P.O.Box 10429 Southport, NC 28461 T> 910.457.2496

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Document Control Desk BSEP 02-0046 / Page 2 MAT/mat

Enclosure:

Response to Request for Additional Information (RAI) 20 John S. Keenan, having been first duly sworn, did depose and say that the information contained herein is true and correct to the best of his information, knowledge and belief; and the sources of his information are officers, employees, and agents of Carolina Power & Light Company.

Notary (Seal)

-My conm mission expires:  ?- A ? 64

Document Control Desk BSEP 02-0046 / Page 3 cc: U. S. Nuclear Regulatory Commission, Rcgici II ATTN: Mr. Luis A. Reyes, Regional Administiator Sam Nunn Atlanta Federal Center 61 Forsyth Street, SW, Suite 23T85 Atlanta, GA 30303-8931 U. S. Nuclear Regulatory Commission ATTN: Mr. Theodore A. Easlick, NRC Senior Resident Inspector 8470 River Road Southport, NC 28461-8869 U. S. Nuclear Regulatory Commission (Electronic Copy Only)

ATTN: Mr. Allen G. Hansen (Mail Stop OWEN 8G9) 11555 Rockville Pike Rockville, MD 20852-2738 U. S. Nuclear Regulatory Commission ATTN: Mr. Mohammed Shuaibi (Mail Stop OWFN 8H4A) 11555 Rockville Pike Rockville, MD 20852-2738 Ms. Jo A. Sanford Chair - North Carolina Utilities Commission P.O. Box 29510 Raleigh, NC 27626-0510 Mr. Mel Fry Director - Division of Radiation Protection North Carolina Department of Environment and Natural Resources 3825 Barrett Drive Raleigh, NC 27609-7221

BSEP 02-0046 Enclosure Page 1 of 4 ENCLOSURE BRUNSWICK STEAM ELECTRIC PLANT, UNIT NOS. 1 AND 2 DOCKET NOS. 50-325 AND 50-324/LICENSE NOS. DPR-71 AND DPR-62 RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION REGARDING REQUEST FOR LICENSE AMENDMENTS - EXTENDED POWER UPRATE (NRC TAC NOS. MB2700 AND MB2701)

Response to Request for Additional Information (RAI) 20

Background

On August 9, 2001 (Serial: BSEP 01-0086), Carolina Power & Light (CP&L) Company requested a revision to the Operating Licenses (OLs) and the Technical Specifications for the Brunswick Steam Electric Plant (BSEP), Units 1 and 2. The proposed license amendments increase the maximum power level authorized by Section 2.C.(1) of OLs DPR-71 and DPR-62 from 2558 megawatts thermal (MWt) to 2923 MWt. Subsequently, on February 13, 2002, CP&L provided a response to a Request for Additional Information (RAI) concerning the containment pressure and temperature analyses performed in support of the BSEP extended power uprate (EPU) (Serial: BSEP 02-0037). On February 13, 2002, during a telephone conversation regarding BSEP 02-0037, the NRC requested additional curves associated with the containment pressure and temperature analyses. The response to this RAI follows.

NRC Question 20-1 Please provide (1) a plot of long term RHR NPSH requirements based on Table 7-1 of CP&L's EPU amendment request dated August 9, 2001, and (2) a plot of long term CS NPSH requirements based on Table 7-2 of CP&L's EPU amendment request dated August 9, 2001.

Response to Ouestion 20-1 The following graphs provide the requested information.

BSEP 02-0046 Enclosure Page 2 of 4 DBA LOCA CS NPSH Summary 25.0 20.0 15.0

-" 10.0 5.0 -

-5.0 (hours)

- Containment Pressure --a- NPSH Margin, Credit =0 psi

-o- NPSH Margin, Credit = Actual - NPSH Margin, Credit = 5 psi DBA LOCA CS NPSH Summary 25.0 20.0 15.0 o.o Z 10.0 5.0 0.0 00 . 0.0 30.0 40.0

-5.0 (hours)

-Containment Pressure --- NPSH Margin, Credit = 0 psi

-o- NPSH Margin, Credit = Actual --- NPSH Margin, Credit = 5 psi

BSEP 02-0046 Enclosure Page 3 of 4 DBA LOCA RHR NPSH Summary 25.0 20.0 15.0 0.0 00 0.1 0.2 0.3 0.4 0,5

-5.0 (hours)

-Containment Pressure - NPSH Margin, Credit = 0 psi

-o- NPSH Margin, Credit = Actual --- NPSH Margin, Credit = 5 psi DBA LOCA RHR NPSH Summary IMt (hours)

- Containment Pressure --o- NPSH Margin, Credit = 0 psi

-o- NPSH Margin, Credit = Actual - NPSH Margin, Credit = 5 psi

BSEP 02-0046 Enclosure Page 4 of 4 NRC Ouestion 20-2 Please provide (1) a plot similar to "Figure 7 - Uncontrolled Drywell Hydrogen and Oxygen Concentrations for EPU," of the RAI 14 response, showing Controlled Drywell Hydrogen and Oxygen Concentrations for EPU and (2) a plot similar to "Figure 8 - Uncontrolled Wetwell Hydrogen and Oxygen Concentrations for EPU," of the RAI 14 response, showing Controlled Wetwell Hydrogen and Oxygen Concentrations for EPU.

Response to Question 20-2 The following figure provides the controlled and uncontrolled concentrations of hydrogen and oxygen for the containment drywell and wetwell mixed volume.

20

-With Nitrogen Dilution Without Nitrogen Dilution]

15 E

.2 0

10

'4

4) Hydrogen U

5 0

10 100 0.01 0.1 Time After LOCA (days)