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| | author name = Schwencer A | | | author name = Schwencer A |
| | author affiliation = US Atomic Energy Commission (AEC) | | | author affiliation = US Atomic Energy Commission (AEC) |
| | addressee name = Watson J E | | | addressee name = Watson J |
| | addressee affiliation = Tennessee Valley Authority | | | addressee affiliation = Tennessee Valley Authority |
| | docket = 05000438, 05000439 | | | docket = 05000438, 05000439 |
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| =Text= | | =Text= |
| {{#Wiki_filter:A.4 ~Docket Nos. 50-438 and 50-439Z Tennessee Valley Authority ATTN: Mr. James E. Watson Manager of Power 818 Power Building Chattanooga, Tennessee 37401 DISTRIBUTION: | | {{#Wiki_filter:W A. S DISTRIBUTION: |
| NRC PDR L PDR Docket Files LWR 2-3 Rdg LWR ADs FSchroeder AKenneke LWR TCs ELD IE (3) DDavis EGoulbourne LShao WGammill LWR BCs ACRS (16)Gentlemen:
| | NRC PDR |
| During several recent inspections (January 29-31, 1975 and March 5, 1975) of your Bellefonte site, we noticed that excavation blasting had caused large limestone layers to slide over what appears to be a clay lubricated seam. Section 2.5 of your PSAR indicated some clay seams but in our review and evaluation, we had not expected clay seams to occur at elevations as high as have been observed. | | ~ |
| This situation has given rise to some concerns related to your rock anchor design for the containment vessels. | | 4 L PDR Docket Files (2) |
| To enable us to resolve these concerns, we are enclosing a request for additional information. | | LWR 2-3 Rdg LWR ADs Docket Nos. 50-438 FSchroeder and 50-439Z AKenneke LWR TCs ELD IE (3) |
| We need your response to these requests by April 4. 1975. If you can not respond within this time, please notify us within seven (7) days as to the date you will be able to furnish the requested information. | | DDavis Tennessee Valley Authority EGoulbourne ATTN: Mr. James E. Watson LShao Manager of Power WGammill 818 Power Building LWR BCs Chattanooga, Tennessee 37401 ACRS (16) |
| Sincerely, R. erg2usan A. Schwencer, Chief Light Water Reactors Branch 2-3 Division of Reactor Licensing | | Gentlemen: |
| | During several recent inspections (January 29-31, 1975 and March 5, 1975) of your Bellefonte site, we noticed that excavation blasting had caused large limestone layers to slide over what appears to be a clay lubricated seam. Section 2.5 of your PSAR indicated some clay seams but in our review and evaluation, we had not expected clay seams to occur at elevations as high as have been observed. This situation has given rise to some concerns related to your rock anchor design for the containment vessels. |
| | To enable us to resolve these concerns, we are enclosing a request for additional information. We need your response to these requests by April 4. 1975. If you can not respond within this time, please notify us within seven (7) days as to the date you will be able to furnish the requested information. |
| | Sincerely, R. erg2usan i' q A. Schwencer, Chief Light Water Reactors Branch 2-3 Division of Reactor Licensing |
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| ==Enclosure:== | | ==Enclosure:== |
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| Request for Additional Information ccs: Mr. R. H. Marquis General Counsel 629 New Sprakle Building Knoxville, Tennessee 37902 Mr. T. Spink Licensing Engineer Tennessee Valley Authority 303 Power Building Chattanooga, Tennessee 3 7401 becs: E. G. Beasley, Jr. 307 U.B.A. Tennessee V lley Authorit-y oPVICE" -Knerville,-jennessee.3 1902.x7.86LIWR2 3 .C-:SE-DTR | | Request for Additional Information ccs: Mr. R. H. Marquis Mr. T. Spink General Counsel Licensing Engineer 629 New Sprakle Building Tennessee Valley Authority Knoxville, Tennessee 37902 303 Power Building Chattanooga, Tennessee 37401 becs: E. G. Beasley, Jr. |
| .C-SA-DTR .C-LWR.2-3: | | 307 U.B.A. |
| RL, *uFIMC ... DDav......rm- | | Tennessee V lley Authorit-y oPVICE" -Knerville,-jennessee.31902.x7.86LIWR2 3 .C-:SE-DTR . C-SA-DTR .C-LWR.2-3: RL, |
| .L ha... ............ | | *uFIMC ... DDav......rm- .L ha... ............ Gamm ill.........2.... .AS.cmencer. |
| Gamm ill.........2.... .AS.cmencer. | | J. R..Bucha an, ORNL I . |
| J. R..Bucha an, ORNL I . OAT .. B. Abernlthy4 DTIE 3 -75 / -/75 -- ...-./7- ...3/....75. | | OAT .. B. Abernlthy4 DTIE ...-. ... 3 -75 / -/75 -- /7- 3/....75. |
| Form AEC-318 (Rev. 9-53) AECM 0240 U. S. GOVERNMENT PRINTING OFFICE9 1974-526-148 S (2)W i' q TENNESSEE VALLEY AUTHORITY BELLEFONTE.NUCLEAR PLANT, UNITS 1 AND 2 REQUESTS FOR ADDITIONAL INFORMATION DOCKET NOS. 50-438 AND 50-439 1. Provide figures which show the location (in plan and elevation) of fill concrete and rock for Unit 1 foundation with respect to the containment internal arrangement including the rock anchor tendons. Identify the location of all clay seams (the origin of possible displacements) which are beneath Unit 1 containment and would be intersected by the rock anchor tendons. | | Form AEC-318 (Rev. 9-53) AECM 0240 U. S. GOVERNMENT PRINTING OFFICE9 1974-526-148 |
| | |
| | TENNESSEE VALLEY AUTHORITY BELLEFONTE.NUCLEAR PLANT, UNITS 1 AND 2 REQUESTS FOR ADDITIONAL INFORMATION DOCKET NOS. 50-438 AND 50-439 |
| | : 1. Provide figures which show the location (in plan and elevation) of fill concrete and rock for Unit 1 foundation with respect to the containment internal arrangement including the rock anchor tendons. Identify the location of all clay seams (the origin of possible displacements) which are beneath Unit 1 containment and would be intersected by the rock anchor tendons. |
| : 2. Discuss the effects that blasting created vertical seams in the limestone might have on the rock anchors. | | : 2. Discuss the effects that blasting created vertical seams in the limestone might have on the rock anchors. |
| : 3. Discuss the effects that vertical forces (e.g., LOCA pressure loads) might have on differential liner motion at the intersection of the containment wall and floor due to 1) squeezing of .clay seams and 2) the heterogeneous foundation of fill concrete and rock. 4. Discuss the effects that horizontal forces (e.g., SSE loads) might have on buckling or thrusting of the limestone layers due to sliding across the clay seam. 5. Discuss the effect that containment heat load due to plant operation over a 40-year period might have on the clay seams in the foundation and any subsequent impact on the grouted rock anchors (e.g., cracking the grout). 6. Discuss the effect that swelling of the clay seam due to the construction excavation might have on cracking of the rock anchor grouting. | | : 3. Discuss the effects that vertical forces (e.g., LOCA pressure loads) might have on differential liner motion at the intersection of the containment wall and floor due to 1) squeezing of .clay seams and 2) the heterogeneous foundation of fill concrete and rock. |
| : 7. Discuss the effects that a reduction in the rock modulus of elasticity due to blast induced fissures will have on both the rock anchors and differential liner motion (see No. 3 above also). 8. Discuss the precautions that are being taken to assure complete grouting of the blast induced fissures. | | : 4. Discuss the effects that horizontal forces (e.g., SSE loads) might have on buckling or thrusting of the limestone layers due to sliding across the clay seam. |
| The specific concerns are the effects of any ungrouted areas, assurance that sufficient grout is placed and assurance that the fissure is not significantly larger than expected.}} | | : 5. Discuss the effect that containment heat load due to plant operation over a 40-year period might have on the clay seams in the foundation and any subsequent impact on the grouted rock anchors (e.g., cracking the grout). |
| | : 6. Discuss the effect that swelling of the clay seam due to the construction excavation might have on cracking of the rock anchor grouting. |
| | : 7. Discuss the effects that a reduction in the rock modulus of elasticity due to blast induced fissures will have on both the rock anchors and differential liner motion (see No. 3 above also). |
| | : 8. Discuss the precautions that are being taken to assure complete grouting of the blast induced fissures. The specific concerns are the effects of any ungrouted areas, assurance that sufficient grout is placed and assurance that the fissure is not significantly larger than expected.}} |
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Category:Letter
MONTHYEARML23261C4152023-10-10010 October 2023
NRC Letter to Nuclear Development, LLC on Withdrawing Its Application to Transfer Construction Permits for Bellefonte Units 1 and 2
ML23263A1002023-08-28028 August 2023
Withdrawal of Application for License Transfer
ML22147A1362022-06-17017 June 2022
Tennessee Valley Authority Nuclear Quality Assurance Plan, Revision 40
CNL-21-082, Bellefonte Nuclear Plant, Units 1 and 2 - Withdrawal of Request for Extension of Unit 1 and Unit 2 Construction Permits (CPPR-122 and CPPR-123)2021-09-10010 September 2021
Bellefonte Nuclear Plant, Units 1 and 2 - Withdrawal of Request for Extension of Unit 1 and Unit 2 Construction Permits (CPPR-122 and CPPR-123)
ML21246A1322021-09-0303 September 2021
Bellefonte Nuclear Plant, Unit 1 and 2, Status Update and Request to Continue to Hold Pending Appeal
CNL-21-077, Bellefonte Nuclear Plant, Units 1 and 2, Status Update and Request for Extension of Construction Permits (CPPR-122 and CPPR-123)2021-08-31031 August 2021
Bellefonte Nuclear Plant, Units 1 and 2, Status Update and Request for Extension of Construction Permits (CPPR-122 and CPPR-123)
CNL-21-045, Bellefonte Nuclear Plant, Units 1 and 2; Browns Ferry Nuclear Plant, Units 1, 2, and 3; Clinch River Nuclear Site; Sequoyah Nuclear Plant, Units 1 and 2; Watts Bar Nuclear Plant, Unit 1 and 2 - Nuclear Quality Assurance Plan, TVA-NQA-PLN82021-04-29029 April 2021
Bellefonte Nuclear Plant, Units 1 and 2; Browns Ferry Nuclear Plant, Units 1, 2, and 3; Clinch River Nuclear Site; Sequoyah Nuclear Plant, Units 1 and 2; Watts Bar Nuclear Plant, Unit 1 and 2 - Nuclear Quality Assurance Plan, TVA-NQA-PLN89-
ML20335A3932021-01-22022 January 2021
Bellefonte Nuclear Plant, Units 1 and 2 Extension of Construction Permit Expiration Dates (Cac/Epid Nos. 000976/05000438/L-2020-LLA-0214 and 000976/05000439/L 2020
ML20286A1722020-11-0303 November 2020
NRC Response to Nuclear Development Letter Dated September 11, 2020
ML20255A2042020-09-11011 September 2020
Bellefonte Nuclear Plant, Units 1 & 2 - Supplement to Application for Order Approving Construction Permit Transfers and Conforming Administrative Amendments
ML20230A3692020-08-31031 August 2020
Status of the NRC Staff'S Review of Nuclear Development, LLC Application for Order Approving Construction Permit Transfers and Conforming Administrative Construction Permit Amendments and Construction Permit Extension Requests (EPID No. L-2
CNL-20-072, Tennessee Valley Authority - Bellefonte Nuclear Plant (Bln), Units 1 and 2 - Status Update and Request for Extension of Unit 1 Construction Permit CPPR-1222020-08-28028 August 2020
Tennessee Valley Authority - Bellefonte Nuclear Plant (Bln), Units 1 and 2 - Status Update and Request for Extension of Unit 1 Construction Permit CPPR-122
ML20168B0222020-06-16016 June 2020
Bellefonte Nuclear Plant, Unit 1 and 2 - Supplemental Information Regarding Response to Request for Additional Information
CNL-20-039, Bellefonte Nuclear Plant, 1 & 2; Browns Ferry Nuclear Plant, 1 & 2; Clinch River Site; Sequoyah Nuclear Plant, 1 & 2; and Watts Bar Nuclear Station, Units 1 & 2 - Nuclear Quality Assurance Plan, TVA-NQA-PLN89-A, Revision 382020-04-30030 April 2020
Bellefonte Nuclear Plant, 1 & 2; Browns Ferry Nuclear Plant, 1 & 2; Clinch River Site; Sequoyah Nuclear Plant, 1 & 2; and Watts Bar Nuclear Station, Units 1 & 2 - Nuclear Quality Assurance Plan, TVA-NQA-PLN89-A, Revision 38
ML20112F3172020-04-30030 April 2020
Nuclear Development Withholding Letter - March 2020 RAI Response
ML20073P3762020-03-13013 March 2020
Nuclear Development, LLC - Response to Request for Additional Information
ML19298A1942019-11-0505 November 2019
Letter to Nuclear Development - Acceptance Letter to Review CP Transfer Application
ML19281A7862019-10-21021 October 2019
Bellefonte Nuclear Plant, Units 1 and 2 - Licensing Project Manager Assignment
ML19240A3822019-08-28028 August 2019
Bellefonte Nuclear Plant, Units 1 and 2 Response to Request for Supplemental Information
ML19161A2492019-06-18018 June 2019
Bellefonte Nuclear Plant, Units 1 and 2 - NRC Response to Nd Request for Extension to Supplement Date Regarding Construction Permit Transfer Request
ML19155A2432019-06-0404 June 2019
Nuclear Development, LLC - Request for Additional Time to Respond to Request for Supplemental Information
CNL-19-043, Bellefont Nuclear Plant, Units 1 & 2; Browns Ferry Nuclear Plan, Units 1, 2 & 3; Clinch River Nuclear Site; Sequoyah Nuclear Plant, Units 1 & 2; and Watts Bar Nuclear Plant, Units 1 & 2 - Nuclear Quality Assurance Plan, TVA-NQA-PLN89-A, R2019-05-0808 May 2019
Bellefont Nuclear Plant, Units 1 & 2; Browns Ferry Nuclear Plan, Units 1, 2 & 3; Clinch River Nuclear Site; Sequoyah Nuclear Plant, Units 1 & 2; and Watts Bar Nuclear Plant, Units 1 & 2 - Nuclear Quality Assurance Plan, TVA-NQA-PLN89-A, Rev
ML18348B1392019-04-0505 April 2019
Letter to Nuclear Development LLC Bellefonte Nuclear Plant, Units 1 and 2, Containing Enclosure with Supplemental Information Needed for Acceptance of Requested Application
ML18340A0642018-12-20020 December 2018
U.S. Nuclear Regulatory Commission'S Response to Letter from National Environmental Group Regarding the Bellefonte Nuclear Plant, Dated December 1, 2018
ML18319A3322018-12-18018 December 2018
Request for Withholding Proprietary Information from Public Disclosure for the Bellefonte Nuclear Generating Station, Units 1 and 2
ML18318A4282018-11-13013 November 2018
Bellefonte Nuclear Plant - Application for Order Approving Construction Permit Transfers and Conforming Administrative Construction Permit Amendments
ML17233A2292018-06-21021 June 2018
Letter to TVA on Change in Licensing Project Branch and Lead Licensing Project Manager for Bellefonte Units 1 & 2
CNL-18-069, Tennessee Valley Authority - Nuclear Quality Assurance Plan, TVA-NQA-PLN89-A, Revisions 35 and 362018-05-0808 May 2018
Tennessee Valley Authority - Nuclear Quality Assurance Plan, TVA-NQA-PLN89-A, Revisions 35 and 36
CNL-18-022, Bellefonte, Unit 2 - Containment Vertical Tendon (V281) Failure - Final Report2018-02-23023 February 2018
Bellefonte, Unit 2 - Containment Vertical Tendon (V281) Failure - Final Report
CNL-17-154, Nuclear Quality Assurance Plan, TVA-NQA-PLN89-A, Revision 342017-12-27027 December 2017
Nuclear Quality Assurance Plan, TVA-NQA-PLN89-A, Revision 34
CNL-17-137, Bellefonte Nuclear Plant, Unit 2, Containment Vertical Tendon (V281) Failure - Third Interim Report2017-10-30030 October 2017
Bellefonte Nuclear Plant, Unit 2, Containment Vertical Tendon (V281) Failure - Third Interim Report
CNL-17-076, Bellefonte Nuclear Plant, Unit 2 - Containment Vertical Tendon (V281) Failure - Second Interim Report2017-06-0707 June 2017
Bellefonte Nuclear Plant, Unit 2 - Containment Vertical Tendon (V281) Failure - Second Interim Report
CNL-17-051, Bellefonte Nuclear Plant (Bln), Unit 2 - Status Update Regarding Construction Permit CPPR-1232017-03-31031 March 2017
Bellefonte Nuclear Plant (Bln), Unit 2 - Status Update Regarding Construction Permit CPPR-123
CNL-17-004, Bellefonte, Unit 2 - Containment Vertical Tendon (V281) Failure - First Interim Report2017-01-0606 January 2017
Bellefonte, Unit 2 - Containment Vertical Tendon (V281) Failure - First Interim Report
CNL-16-204, Bellefonte, Units 1 and 2, Browns Ferry, Units 1, 2, and 3, Sequoyah, Units 1 and 2, Watts Bar, Units 1 and 2 - Nuclear Quality Assurance Plan, TVA-NQA-PLN89-A, Revision 332016-12-28028 December 2016
Bellefonte, Units 1 and 2, Browns Ferry, Units 1, 2, and 3, Sequoyah, Units 1 and 2, Watts Bar, Units 1 and 2 - Nuclear Quality Assurance Plan, TVA-NQA-PLN89-A, Revision 33
ML16259A1892016-12-0505 December 2016
Nuclear Regulatory Commission Plan for the Audit of Mitigation Strategies Assessment Submittals Related to Order EA-12-049, Order to Modify Licenses With Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events
ML16175A3322016-06-28028 June 2016
Browns Ferry Nuclear Plant, Units 1, 2 and 3, Sequoyah Nuclear Plant, Units 1 and 2, and Watts Bar Nuclear Plant, Units 1 and 2 - Assignment of U.S. Nuclear Regulatory Commission Acting Branch Chief
CNL-16-085, Bellefonte, Browns Ferry, Sequoyah, and Watts Bar - Nuclear Quality Assurance Plan, TVA-NQA-PLN89-A2016-05-10010 May 2016
Bellefonte, Browns Ferry, Sequoyah, and Watts Bar - Nuclear Quality Assurance Plan, TVA-NQA-PLN89-A
ML15307A2232015-11-0909 November 2015
Bellefonte Nuclear Plant, Units 1 and 2 - Project Manager Assignment
ML15288A4972015-10-28028 October 2015
Reassignment of U.S. Nuclear Regulatory Commission Branch Chief
ML15180A3662015-07-0808 July 2015
Bellefonte Nuclear Plant, Units 1 and 2 - Staff Assessment of Information Provided Pursuant to Title 10 of the Code of Federal Regulations Part 50, Section 50.54(f), Seismic Hazard Reevaluations for Recommendation 2.1 of the Near-Term Task
CNL-15-096, Tennessee Valley Authority (TVA) Response to NRC Regulatory Issue Summary 2015-072015-06-19019 June 2015
Tennessee Valley Authority (TVA) Response to NRC Regulatory Issue Summary 2015-07
ML15105A1882015-04-17017 April 2015
Correction Letter for Proposed Director'S Decision Regarding Saporito Petition Dated March 12, 2011
ML13018A2392015-04-0808 April 2015
G20110171 - Letter to Petitioner Saporito on Proposed Director'S Decision Regarding 2.206 Petition Dated: March 12, 2011
ML15023A2592015-02-26026 February 2015
NRC Response to Tennessee Valley Authority - Proposed Alternative Submittal Schedule as Described in the Attached Enclosures Due to the Deferred Construction Status of Bellefonte Nuclear Plant, Units 1 and 2, Dated October 21, 2014
ML14307B7072014-12-10010 December 2014
Supplemental Information Related to Development of Seismic Risk Evaluations for Information Request Pursuant to Title 10 of the Code of Federal Regulations 50.54(f) Regarding Seismic Hazard Reevaluations for Recommendation 2.1 of the Near-T
CNL-14-214, Bellefonte, Units 1 and 2 - Response to Request for Additional Information Regarding Near-Term Task Force Recommendation 2.1: Seismic Hazard and Screening Report2014-12-0303 December 2014
Bellefonte, Units 1 and 2 - Response to Request for Additional Information Regarding Near-Term Task Force Recommendation 2.1: Seismic Hazard and Screening Report
ML14304A5202014-11-0606 November 2014
ACHP-Notice of Availability of the Final Supplemental Environmental Impact Statement for Callaway Plant, Unit 1
ML14304A7222014-11-0606 November 2014
FSEIS Tribal-Notice of Availability of the Final Supplemental Environmental Impact Statement for Callaway Plant, Unit 1 (Mo Shpo Log #008-CY-10)
ML14304A5842014-11-0606 November 2014
Notice of Availability of the Final Supplemental Environmental Impact Statement for Callaway, Unit 1, (Mo Shpo Log #008-CY-10)
2023-08-28
[Table view]
Category:Request for Additional Information (RAI)
MONTHYEARML18348B0642019-04-0505 April 2019
Enclosure - Supplemental Information Needed for Acceptance of Requested Application for Order Approving Construction Permit Transfers and Conforming Administrative Construction Permit Amendments and Exemptions
ML14301A1992014-11-0505 November 2014
Bellefonte Nuclear Plant, Units 1 and 2 - Request for Additional Information Associated with Near-Term Task Force Recommendation 2.1, Seismic Hazard and Screening Report
ML12056A0502012-03-12012 March 2012
Enclosure 4 - Recommendation 2.3: Flooding
ML12056A0482012-03-12012 March 2012
Enclosure 2 - Recommendation 2.1: Flooding
ML12056A0472012-03-12012 March 2012
Enclosure 1 - Recommendation 2.1: Seismic
ML12056A0492012-03-12012 March 2012
Enclosure 3 - Recommendation 2.3: Seismic
ML12056A0512012-03-12012 March 2012
Enclosure 5 - Recommendation 9.3: Emergency Preparedness
ML1111100742011-04-21021 April 2011
Bellefonte Nuclear Plant Units 1 and 2, RAI, Rock Anchor Design for the Containment Vessels
ML0831701222008-11-12012 November 2008
Bellefonte Nuclear Plant, Units 1 and 2 - Request for Additional Information Regarding Environmental Assessment for Reinstatement of Construction Permits
ML0215605992002-06-0505 June 2002
Bellefonte, Units 1 & 2 - Request for Additional Information Regarding Environmental Assessment for Extension of Construction Permits
2019-04-05
[Table view] |
Text
W A. S DISTRIBUTION:
NRC PDR
~
4 L PDR Docket Files (2)
LWR 2-3 Rdg LWR ADs Docket Nos. 50-438 FSchroeder and 50-439Z AKenneke LWR TCs ELD IE (3)
DDavis Tennessee Valley Authority EGoulbourne ATTN: Mr. James E. Watson LShao Manager of Power WGammill 818 Power Building LWR BCs Chattanooga, Tennessee 37401 ACRS (16)
Gentlemen:
During several recent inspections (January 29-31, 1975 and March 5, 1975) of your Bellefonte site, we noticed that excavation blasting had caused large limestone layers to slide over what appears to be a clay lubricated seam. Section 2.5 of your PSAR indicated some clay seams but in our review and evaluation, we had not expected clay seams to occur at elevations as high as have been observed. This situation has given rise to some concerns related to your rock anchor design for the containment vessels.
To enable us to resolve these concerns, we are enclosing a request for additional information. We need your response to these requests by April 4. 1975. If you can not respond within this time, please notify us within seven (7) days as to the date you will be able to furnish the requested information.
Sincerely, R. erg2usan i' q A. Schwencer, Chief Light Water Reactors Branch 2-3 Division of Reactor Licensing
Enclosure:
Request for Additional Information ccs: Mr. R. H. Marquis Mr. T. Spink General Counsel Licensing Engineer 629 New Sprakle Building Tennessee Valley Authority Knoxville, Tennessee 37902 303 Power Building Chattanooga, Tennessee 37401 becs: E. G. Beasley, Jr.
307 U.B.A.
Tennessee V lley Authorit-y oPVICE" -Knerville,-jennessee.31902.x7.86LIWR2 3 .C-:SE-DTR . C-SA-DTR .C-LWR.2-3: RL,
- uFIMC ... DDav......rm- .L ha... ............ Gamm ill.........2.... .AS.cmencer.
J. R..Bucha an, ORNL I .
OAT .. B. Abernlthy4 DTIE ...-. ... 3 -75 / -/75 -- /7- 3/....75.
Form AEC-318 (Rev. 9-53) AECM 0240 U. S. GOVERNMENT PRINTING OFFICE9 1974-526-148
TENNESSEE VALLEY AUTHORITY BELLEFONTE.NUCLEAR PLANT, UNITS 1 AND 2 REQUESTS FOR ADDITIONAL INFORMATION DOCKET NOS. 50-438 AND 50-439
- 1. Provide figures which show the location (in plan and elevation) of fill concrete and rock for Unit 1 foundation with respect to the containment internal arrangement including the rock anchor tendons. Identify the location of all clay seams (the origin of possible displacements) which are beneath Unit 1 containment and would be intersected by the rock anchor tendons.
- 2. Discuss the effects that blasting created vertical seams in the limestone might have on the rock anchors.
- 3. Discuss the effects that vertical forces (e.g., LOCA pressure loads) might have on differential liner motion at the intersection of the containment wall and floor due to 1) squeezing of .clay seams and 2) the heterogeneous foundation of fill concrete and rock.
- 4. Discuss the effects that horizontal forces (e.g., SSE loads) might have on buckling or thrusting of the limestone layers due to sliding across the clay seam.
- 5. Discuss the effect that containment heat load due to plant operation over a 40-year period might have on the clay seams in the foundation and any subsequent impact on the grouted rock anchors (e.g., cracking the grout).
- 6. Discuss the effect that swelling of the clay seam due to the construction excavation might have on cracking of the rock anchor grouting.
- 7. Discuss the effects that a reduction in the rock modulus of elasticity due to blast induced fissures will have on both the rock anchors and differential liner motion (see No. 3 above also).
- 8. Discuss the precautions that are being taken to assure complete grouting of the blast induced fissures. The specific concerns are the effects of any ungrouted areas, assurance that sufficient grout is placed and assurance that the fissure is not significantly larger than expected.
