ML070240464: Difference between revisions

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| number = ML070240464
| number = ML070240464
| issue date = 01/24/2007
| issue date = 01/24/2007
| title = Comanche Peak Steam Electric Station, Unit 1 - E-Mail to Fred Madden and Timothy Hope, Txu Power, from Mohan Thadani, Nrc/Nrr - Request for Additional Information - Relief Request No. B-6 (TAC No. MD3315)
| title = E-Mail to Fred Madden and Timothy Hope, Txu Power, from Mohan Thadani, Nrc/Nrr - Request for Additional Information - Relief Request No. B-6
| author name = Thadani M C
| author name = Thadani M
| author affiliation = NRC/NRR/ADRO/DORL/LPLIV
| author affiliation = NRC/NRR/ADRO/DORL/LPLIV
| addressee name = Hope T, Madden F
| addressee name = Hope T, Madden F
Line 18: Line 18:


=Text=
=Text=
{{#Wiki_filter:From: Mohan ThadaniTo:fred.madden@txu.com ; Timothy.Hope@txu.comDate: 1/24/2007 1:39:52 PM
{{#Wiki_filter:From:             Mohan Thadani To:               fred.madden@txu.com ; Timothy.Hope@txu.com Date:             1/24/2007 1:39:52 PM


==Subject:==
==Subject:==
REQUEST FOR ADDITIONAL INFORMATION: RR B-6 (TAC MD3315) Fred/Tim:
REQUEST FOR ADDITIONAL INFORMATION: RR B-6 (TAC MD3315)
The NRC staff has reviewed your request for Relief No. B-6, and has identified the followingRAI. Your response to the RAI below is needed in order to facilitate the NRC response to your request. If TXU Generation Company LP would like a formal request for this RAI, such a request will be promptly provided.Thank you for your cooperation.
Fred/Tim:
Mohan                                                                           OFFICE OF NUCLEAR REACTORREGULATION REQUEST FOR ADDITIONAL INFORMATION RELIEF REQUEST NO. B-6 COMANCHE PEAK STEAM ELECTRIC STATION TXU GENERATION COMPANY LP DOCKET NO. 50-4451.On page 18 of your transmittal, you indicate that weld shrinkage caused byapplication of the overlays will be measured and evaluated for any system impacts, as required by Code Case N-504-2, paragraph (g)(3). It is the staff's expectation that the requirements of Code Case N-504-2 (g)(2) and (g)(3) be completed prior to startup. Please discuss your time line for completing these requirements with respect to plant startup.2.On page 18 of your submittal, you state in part that your basis for increasing the overlaysurface area to 300 in2 is because the staff approved a 300 in2 at Susquehanna Steam Electric Station. Since each granting of relief is plant specific, please provide additional detail why your configuration(s) are similar in design and material to the SSES relief request as the basis why your modification to Code Case N-638-1 provides an acceptable level of quality and safety.3.On page 19 of your submittal, you state that Reg. Guide 1.147 Rev. 14 condition on useof N-638-1 is not applicable and will not be applied. Identify the UT acceptance criteria that will be used for the complete full structural weld overlay and heat-affected zone beneath the weld overlay. Since the acceptance criteria to be used is not consistent with the respective positionsstated in Regulatory Guide 1.147 for the applicable code cases, provide the technical bases for its use. 4. Provide a commitment to provide within 14 days from completion of UT examination ofthe weld overlays, a report that summarizes the results of the examinations, consistent with the September 14, 2006 letter from Exelon to NRC regarding Byron Station, Unit 1 Relief Request I3R-03.5.On page 20 of your submittal, you propose the use of contact pyrometers versusattached thermocouples. Please provide a more detailed discussion of your basis on the modification to use contact pyrometers and why your modification provides an acceptable level of quality and safety.6.Please discuss your repair strategy if the post overlay preservice inspection resultsidentify indications that exceed the acceptance criteria under Table IWB-3514-2.
The NRC staff has reviewed your request for Relief No. B-6, and has identified the following RAI. Your response to the RAI below is needed in order to facilitate the NRC response to your request. If TXU Generation Company LP would like a formal request for this RAI, such a request will be promptly provided.
CC:Steingass, Timothy Mail Envelope Properties(45B7A7F8.D83 : 23 : 35106)
Thank you for your cooperation.
Mohan OFFICE OF NUCLEAR REACTOR REGULATION REQUEST FOR ADDITIONAL INFORMATION RELIEF REQUEST NO. B-6 COMANCHE PEAK STEAM ELECTRIC STATION TXU GENERATION COMPANY LP DOCKET NO. 50-445
: 1.     On page 18 of your transmittal, you indicate that weld shrinkage caused by application of the overlays will be measured and evaluated for any system impacts, as required by Code Case N-504-2, paragraph (g)(3). It is the staffs expectation that the requirements of Code Case N-504-2 (g)(2) and (g)(3) be completed prior to startup. Please discuss your time line for completing these requirements with respect to plant startup.
: 2.       On page 18 of your submittal, you state in part that your basis for increasing the overlay surface area to 300 in2 is because the staff approved a 300 in2 at Susquehanna Steam Electric Station. Since each granting of relief is plant specific, please provide additional detail why your configuration(s) are similar in design and material to the SSES relief request as the basis why your modification to Code Case N-638-1 provides an acceptable level of quality and safety.
: 3.       On page 19 of your submittal, you state that Reg. Guide 1.147 Rev. 14 condition on use of N-638-1 is not applicable and will not be applied. Identify the UT acceptance criteria that will be used for the complete full structural weld overlay and heat-affected zone beneath the weld overlay. Since the acceptance criteria to be used is not consistent with the respective positions stated in Regulatory Guide 1.147 for the applicable code cases, provide the technical bases for its use.
: 4.       Provide a commitment to provide within 14 days from completion of UT examination of the weld overlays, a report that summarizes the results of the examinations, consistent with the September 14, 2006 letter from Exelon to NRC regarding Byron Station, Unit 1 Relief Request I3R-03.
: 5.       On page 20 of your submittal, you propose the use of contact pyrometers versus attached thermocouples. Please provide a more detailed discussion of your basis on the modification to use contact pyrometers and why your modification provides an acceptable level of quality and safety.
: 6.       Please discuss your repair strategy if the post overlay preservice inspection results identify indications that exceed the acceptance criteria under Table IWB-3514-2.
CC:     Steingass, Timothy
 
Mail Envelope Properties   (45B7A7F8.D83 : 23 : 35106)


==Subject:==
==Subject:==
REQUEST FOR ADDITIONAL INFORMATION: RR A-7Creation Date 1/24/2007 1:39:52 PMFrom: Mohan ThadaniCreated By:MCT@nrc.govRecipientsnrc.gov TWGWPO02.HQGWDO01 TXS3 CC (Timothy Steingass)txu.com   fred.madden (fred.madden@txu.com )
REQUEST FOR ADDITIONAL INFORMATION: RR A-7 Creation Date         1/24/2007 1:39:52 PM From:                 Mohan Thadani Created By:           MCT@nrc.gov Recipients nrc.gov TWGWPO02.HQGWDO01 TXS3 CC (Timothy Steingass) txu.com fred.madden (fred.madden@txu.com )
Timothy.Hope (Timothy.Hope@txu.com)Post OfficeRoute TWGWPO02.HQGWDO01nrc.govtxu.comFilesSizeDate & Time MESSAGE46421/24/2007 1:39:52 PM Options Expiration Date:
Timothy.Hope (Timothy.Hope@txu.com)
None Priority: Standard ReplyRequested:
Post Office                                                          Route TWGWPO02.HQGWDO01                                                  nrc.gov txu.com Files                          Size              Date & Time MESSAGE                      4642              1/24/2007 1:39:52 PM Options Expiration Date:             None Priority:                     Standard ReplyRequested:               No Return Notification:         None Concealed  
No Return Notification:
None Concealed  


==Subject:==
==Subject:==
 
No Security:                     Standard}}
No Security: Standard}}

Latest revision as of 10:15, 23 November 2019

E-Mail to Fred Madden and Timothy Hope, Txu Power, from Mohan Thadani, Nrc/Nrr - Request for Additional Information - Relief Request No. B-6
ML070240464
Person / Time
Site: Comanche Peak Luminant icon.png
Issue date: 01/24/2007
From: Thadani M
NRC/NRR/ADRO/DORL/LPLIV
To: Hope T, Madden F
TXU Power
Thadani, M C, NRR/DORL/LP4, 415-1476
References
B-6, TAC MD3315
Download: ML070240464 (2)
v • d • e


Text

From: Mohan Thadani To: fred.madden@txu.com ; Timothy.Hope@txu.com Date: 1/24/2007 1:39:52 PM

Subject:

REQUEST FOR ADDITIONAL INFORMATION: RR B-6 (TAC MD3315)

Fred/Tim:

The NRC staff has reviewed your request for Relief No. B-6, and has identified the following RAI. Your response to the RAI below is needed in order to facilitate the NRC response to your request. If TXU Generation Company LP would like a formal request for this RAI, such a request will be promptly provided.

Thank you for your cooperation.

Mohan OFFICE OF NUCLEAR REACTOR REGULATION REQUEST FOR ADDITIONAL INFORMATION RELIEF REQUEST NO. B-6 COMANCHE PEAK STEAM ELECTRIC STATION TXU GENERATION COMPANY LP DOCKET NO. 50-445

1. On page 18 of your transmittal, you indicate that weld shrinkage caused by application of the overlays will be measured and evaluated for any system impacts, as required by Code Case N-504-2, paragraph (g)(3). It is the staffs expectation that the requirements of Code Case N-504-2 (g)(2) and (g)(3) be completed prior to startup. Please discuss your time line for completing these requirements with respect to plant startup.
2. On page 18 of your submittal, you state in part that your basis for increasing the overlay surface area to 300 in2 is because the staff approved a 300 in2 at Susquehanna Steam Electric Station. Since each granting of relief is plant specific, please provide additional detail why your configuration(s) are similar in design and material to the SSES relief request as the basis why your modification to Code Case N-638-1 provides an acceptable level of quality and safety.
3. On page 19 of your submittal, you state that Reg. Guide 1.147 Rev. 14 condition on use of N-638-1 is not applicable and will not be applied. Identify the UT acceptance criteria that will be used for the complete full structural weld overlay and heat-affected zone beneath the weld overlay. Since the acceptance criteria to be used is not consistent with the respective positions stated in Regulatory Guide 1.147 for the applicable code cases, provide the technical bases for its use.
4. Provide a commitment to provide within 14 days from completion of UT examination of the weld overlays, a report that summarizes the results of the examinations, consistent with the September 14, 2006 letter from Exelon to NRC regarding Byron Station, Unit 1 Relief Request I3R-03.
5. On page 20 of your submittal, you propose the use of contact pyrometers versus attached thermocouples. Please provide a more detailed discussion of your basis on the modification to use contact pyrometers and why your modification provides an acceptable level of quality and safety.
6. Please discuss your repair strategy if the post overlay preservice inspection results identify indications that exceed the acceptance criteria under Table IWB-3514-2.

CC: Steingass, Timothy

Mail Envelope Properties (45B7A7F8.D83 : 23 : 35106)

Subject:

REQUEST FOR ADDITIONAL INFORMATION: RR A-7 Creation Date 1/24/2007 1:39:52 PM From: Mohan Thadani Created By: MCT@nrc.gov Recipients nrc.gov TWGWPO02.HQGWDO01 TXS3 CC (Timothy Steingass) txu.com fred.madden (fred.madden@txu.com )

Timothy.Hope (Timothy.Hope@txu.com)

Post Office Route TWGWPO02.HQGWDO01 nrc.gov txu.com Files Size Date & Time MESSAGE 4642 1/24/2007 1:39:52 PM Options Expiration Date: None Priority: Standard ReplyRequested: No Return Notification: None Concealed

Subject:

No Security: Standard

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