RS-03-082, Corrected Fluence Tables for Dresden Units 2 & 3 License Renewal Application
| ML031190598 | |
| Person / Time | |
|---|---|
| Site: | Dresden, Quad Cities  |
| Issue date: | 04/17/2003 |
| From: | Simpson P Exelon Generation Co |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| RS-03-082 | |
| Download: ML031190598 (6) | |
Text
ExektnM Exelon Generation 4300 Winfield Road Warrenville, IL 60555 www exeloncorp coM Nuclear 10 CFR 54 RS-03-082 April 17, 2003 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Dresden Nuclear Power Station, Units 2 and 3 Facility Operating License Nos. DPR-19 and DPR-25 NRC Docket No. 50-237 and 50-249 Quad Cities Nuclear Power Station, Units 1 and 2 Facility Operating License Nos. DPR-29 and DPR-30 NRC Docket No 50-254 and 50-265
Subject:
References:
Corrected Fluence Tables for Dresden Nuclear Power Station, Units 2 and 3 License Renewal Application (1)
Letter from J. A. Benjamin (EGC) to USNRC, "Application for Renewed Operating Licenses," dated January 3, 2003 (2)
Letter from P. R. Simpson (EGC) to USNRC, "Request for Changes Related to Technical Specifications Section 3.4.9, 'Reactor Coolant System Pressure and Temperature (PIT) Limits," dated February 27, 2003 Exelon Generation Company, LLC (EGC) is submitting corrections to Tables 4.2.6-1 and 4.2.7-1 which were previously submitted as part of the Application for Renewed Operating Licenses for Dresden Nuclear Power Station (DNPS) and Quad Cities Nuclear Power Station (QCNPS) in Reference 1. The corrections are included in Attachment 1 and are shown with a shaded background.
While performing a similar scope of work for a different customer, General Electric (GENE) discovered errors in Tables 4.2.6-1 and 4.2.7-1. GENE determined that an incorrect fluence value was used to calculate the mean adjusted reference temperature (mean RTNDT) and the delta reference temperature (delta RTNDT) for the DNPS, Units 2 and 3 reactor vessel circumferential and axial welds. Rather than using peak surface fluence as specified in BWRVIP-05, "BWR Reactor Pressure Vessel Shell Weld Inspection Recommendations," the peak fluence at % depth of reactor vessel plate was used. This resulted in incorrect values for delta RTNDT and mean RTNDT being submitted in Tables 4.2.6-1 and 4.2.7-1. The corrected 0\\DV AO c g/
April 17, 2003 U. S. Nuclear Regulatory Commission Page 2 mean RTNDT values are still well below the recommended BWRVIP-05 requirements for circumferential and axial welds. The peak surface fluence was correctly presented in the tables.
The QCNPS information within Reference 1 is not impacted by the above described error.
This error had no impact on the pressure-temperature curve report submitted for DNPS as part of Reference 2.
Should you have any questions, please contact Al Fulvio at 610-765-5936.
Respectfully, AIR Patrick R. Simpson Manager - Licensing Mid-West Regional Operating Group Attachments:
Affidavit : Corrected LRA Tables 4.2.6-1 and 4.2.7-1 cc:
Regional Administrator - NRC Region IlIl NRC Senior Resident Inspector - Quad Cities Nuclear Power Station NRC Senior Resident Inspector - Dresden Nuclear Power Station Office of Nuclear Facility Safety - Illinois Department of Nuclear Safety
STATE OF ILLINOIS
)
COUNTY OF DUPAGE IN THE MATTER OF
)
EXELON GENERATION COMPANY, LLC
)
Docket Numbers Dresden Nuclear Power Station - Unit 2 and Unit 3
)
50-237 and 50-249 Quad Cities Nuclear Power Station - Unit 1 and Unit 2 )
50-254 and 50-265
SUBJECT:
Corrected Fluence Tables for Dresden Nuclear Power Station, Units 2 and 3 License Renewal Application AFFIDAVIT I affirm that the content of this transmittal is true and correct to the best of my knowledge, information, and belief.
Parc R.mso Patrick R. Simpson 0
Manager - Licensing Mid-West Regional Operating Group Subscribed and sworn to before me, a Notary Public in and for the State above named, this 1 7 tk day of
, 2003 NotaryuI
-OFfOFFICIAL SEAL s i~MTHY.BAM Corrected LRA Tables 4.2.6-1 and 4.2.7-1 Dresden Nuclear Power Station
Table 4.2.6-1 Effects for Irradiation on RPV Circumferential Weld Properties Dresden Units 2 & 3 B&W Dresden Unit 2 Dresden Unit 3 Group 64 EFPY 54 EFPY 54 EFPY Cu%
0.31 0.23 0.34 Ni%
0.59 0.59 0.68 CF 196.7 168 221 Fluence at clad/weld 0.19 0.042 0.041 interface (1019 n/cm2 )
ARTNDTW/O margin 109.4 4,4, 58 (OF)__
RTNDT(U)
(OF) 20 10
-5 Mean RTNDT (OF) 129.4 54 5
P(FIE)
NRC 4.83 x 10 P(FIE)
Table 4.2.7-1 Effects for Irradiation on RPV Axial Weld Properties Dresden Units 2 & 3 Value B&W SER DRE 2 DRE 3 Supplement 54 EFPY 54 EFPY 64 EFPY (Clinton)
Cu%
.25 0.10 0.24 0.24 Ni%.35 1.08 0.37 0.37 CF 142.5 141 141 Fluence x 1019 0.35 0.69 0.057 0.057 n/cm2 ARTNDT 88.9 121
- 4.
44'A RTNDT(U) 10
-30 23 23 OF Mean RTNDT 98.9 91 67 67 P(FIE) 1.87 x 10-1 2.73 x 10-3 3.89 x 10-'
5.07 x 108 NRC P(FIE) 1.52 x 10-3 BWRVIP