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Category:CORRESPONDENCE-LETTERS
MONTHYEARML20153E4221988-08-29029 August 1988 Forwards Order Revoking CPPR-172 & CPPR-173 & NRC Staff Evaluation of Site Stabilization Plan Per from Util ML20153E2331988-08-26026 August 1988 Forwards Status of Site Stabilization Activities,Per R Auluck Request.Tva Has Completed All Major Site Stabilization Activities at Plant W/Only Minor Maint Activities Remaining ML20215C5661986-10-0606 October 1986 Further Response to FOIA Request for All Records Concerning Allegations That Pullman Power Products Employees Intimidated QC Inspectors.Forwards App F Documents.App G & H Documents Withheld (Ref FOIA Exemptions 7 & 5) ML20133N7321985-10-24024 October 1985 Forwards Proposed Cancellation Plans for Plants Officially Canceled on 840829.Requests Withdrawal of CPPR-150,CPPR-152, CPPR-172 & CPPR-173.W/two Oversize Drawings ML20128Q2441985-05-17017 May 1985 Further Response to FOIA Request for Six Categories of Records Re Nuclear Waste Policy Act.App B Documents Available in Pdr.Forwards App C Documents ML18029A3981985-02-27027 February 1985 Responds to RM Diggs 850117 & 0211 Ltrs Re Determination of Fees for Const Extension Requests.Util Supports NRC Determination & Will Submit Fees ML20096F8731984-09-0505 September 1984 Forwards Motion to Terminate Appellate Jurisdiction.W/O Encl.Related Correspondence ML20077G6661983-07-27027 July 1983 Part 21 Rept Re Circuit Breakers Mfg Between Nov 1981 & Feb 1982.Breakers Should Be Inspected for Broken Puffer Linkage Studs.Stud Identified as Part Number 192247A.List of Circuit Breakers for Nuclear Plants Encl ML20023C3361983-05-12012 May 1983 Forwards Details of Deferral Plans for Yellow Creek Nuclear Plant. ML20073S5851983-02-24024 February 1983 FOIA Request for All Documents Re Decision to Terminate Const of Facility ML20071B9741983-02-24024 February 1983 Reiterates 830121 Request for CP Extension Until 870901 to Permit Final Decision Re Future of Nuclear Units Based on Load Growth/Demand.Deferral Plan Details to Be Submitted by 830506 ML20069D8691982-09-20020 September 1982 Forwards Black Fox Station Soil Stabilization & Erosion Control Program, Per ASLB 820618 Memorandum & Order.Plan Addresses Concerns Raised in NRC 820602 Submittal ML20055C0611982-08-0606 August 1982 Forwards Info Re QA for Deferred Plants,In Response to NRC .Possible Cancellation of Some Units Will Be Discussed at Future Meeting of TVA Board of Directors ML20054K8881982-06-29029 June 1982 Forwards Yellow Creek Nuclear Plant Socioeconomic Monitoring & Mitigation Rept YCNP-SMR-7, Jan-June 1981 ML20054K1531982-06-23023 June 1982 Informs That Final Deficiency Repts for Listed Nonconformances Will Not Be Submitted Until Final Decision Is Made Re Const of Projects ML20052F0901982-05-0404 May 1982 Informs That Addl Action Will Be Required in Order to Fully Comply W/Asme Code Requirements for Radiography of safe-end Welds.Discrepancy Will Be Resolved by re-radiographing Affected Welds ML20069B9611982-03-0202 March 1982 Informs of Changes Re Slowdown in Const Activities.Busing of Employees No Longer Justifiable Due to Lower Employment Levels & Const Schedule Changes.Waterfowl Wetlands Wildlife Monitoring Results Show Const Has Not Affected Wildlife ML20040H4141982-02-10010 February 1982 Notifies That Facilities Ref CENPD-210,Revision 3 Per 820202 Request.Info Based on Review of PSARs ML20039B5581981-12-17017 December 1981 Forwards Yellow Creek Nuclear Plant Socioeconomic Monitoring & Mitigation Rept, Per Fes Section 4.5.2.5 ML20039A2811981-12-0404 December 1981 Notifies That Environ Const Noise Monitoring Procedures Will Be Revised at Hartsville & Yellow Creek & Terminated at Phipps Bend.Changes Caused by Slowdown & Cessation of Const. Summary of Const Noise Monitoring Program History Encl ML20009D9311981-07-0808 July 1981 Forwards Response to IE Bulletin 81-03, Flow Blockage of Cooling Water to Safety Sys Components by Corbicula Sp (Asiatic Clam) & Mytilus Sp (Mussel). ML20004B4021981-05-21021 May 1981 Responds to Violations Noted in IE Insp Repts 50-566/81-02 & 50-567/81-02 Re Failure to Establish Adequate Measures to Control Welding & Nondestructive Exam.Rept Revises 810330 Rept to Reflect Bend Sample Fissure Evaluation Results ML19350D9121981-05-20020 May 1981 Forwards Yellow Creek Nuclear Plant Socioeconomic Monitoring & Mitigation Rept, Jan-June 1981 ML19350C7811981-03-30030 March 1981 Responds to NRC 810304 Ltr Re Violations Noted in IE Insp Repts 50-566/81-02 & 50-567/81-02.Corrective Actions: Certification of Welders Previously Certified Were Revoked & Are Tracking Potentially Unacceptable Welds ML19341D3021981-02-26026 February 1981 Forwards Revised Description of Onsite Meteorological Measurements Program.Revision Will Be Included in OL Application ML20003A0731981-01-26026 January 1981 Advises of Work W/Three Counties in Ms to Upgrade Emergency Response Capabilities.Requests That NRC Ltr Be Sent to Local Officials Explaining Use of Mitigation Funds for Emergency Response ML19341A0831980-12-23023 December 1980 Responds to NRC 801125 Ltr Re Violations Noted in IE Insp Repts 50-566/80-17 & 50-567/80-17.Corrective Actions:Part Ii,Section 5.1 of Div of Nuclear Power Operational QA Manual Rewritten ML19345D5871980-12-0505 December 1980 Forwards Socioeconomic Monitoring & Mitigation Rept, Semiannual Rept for Jul-Dec.Rept Prepared for Fes ML19338G6101980-10-24024 October 1980 Requests Expedited Review of Newport News Industrial Corp Draft Topical Rept Re Vol Reduction Sys.Util Plans to Utilize Sys at Units 1 & 2 ML19338G2151980-10-21021 October 1980 Forwards Response to NRC 800926 Lr Re Violation Noted in IE Insp Repts 50-566/80-14 & 50-567/80-14.Corrective Actions: Review of Concrete Test Dispositioned in Qcir 51057 Showed Design Strength Should Be Realized at Later than Design Age ML19338G4281980-10-0303 October 1980 Submits Second Revised Response to Infraction Noted in IE Insp Repts 50-566/80-03 & 50-567/80-03.Corrective Actions: Radiographs Made Before 800207 re-examined for Deficiencies. Film Processing & Shim Placement Guidelines Established ML19338E1241980-08-18018 August 1980 Responds to NRC 800228 Ltr Re Violations Noted in IE Insp Repts 50-566/80-03 & 50-567/80-03.Corrective Actions: Radiographs Before 800207 re-examined & Radiographers Instructed in Requirements of Shim Placement ML19331D1441980-08-18018 August 1980 Forwards Revised Final Response to IE Insp Repts 50-566/ 80-03 & 50-567/80-03.Response Reflects Util Decision to Radiograph Addl Seven Welds.Rept Will Be Submitted by 801027 Re Film Darkening Problem,Per NRC Request ML19320C0241980-07-11011 July 1980 Forwards Revised Final Deficiency Rept Re Placement of Earthfill in Essential Raw Cooling Water Spray Pond ML19320C5471980-07-10010 July 1980 Forwards Final Deficiency Rept Re Const QA Audit ML19320C5371980-07-10010 July 1980 Forwards Final Deficiency Rept Re Placement of Earthfill in ERCW Spray Pond ML19320C2251980-07-0909 July 1980 Forwards Second Interim Deficiency Rept Re Const QA Audit. Next Rept Will Be Submitted by 800820.W/o Encl ML19318A3751980-06-13013 June 1980 Forwards Final Deficiency Rept Re Defective Concrete Pour in Auxiliary Bldg ML19310A4311980-06-10010 June 1980 Responds to IE Insp Repts 50-566/80-03 & 50-567/80-03 Re Failure to Establish Adequate Measures to Control Radiography.Radiography of Welds Scheduled for Completion by 800701 ML19320D6471980-06-0303 June 1980 Forwards Do Jourdan 800328 Ltr for Consideration ML19316B0711980-05-27027 May 1980 Forwards First Interim Deficiency Rept Re Const QA Audit YC-C-80-05.Next Rept Will Be Submitted by 800710 ML19312E4851980-05-27027 May 1980 Forwards First Interim Deficiency Rept Re Placement & Compaction of Concrete Pour A2-D1 ML19323F1361980-05-21021 May 1980 Forwards First Interim Deficiency Rept Re Const QA Audit ML19316A7591980-05-19019 May 1980 Requests NRC Cooperation in Expediting Approval of York Model 299 Type 3G Moisture Separator Discussed in Topical Rept York 80-67459,submitted 800331.Separators Required by Util by 800822 Due to Const Delays ML19323G6001980-05-19019 May 1980 Advises That Ah Gutterman Will No Longer Appear in Proceedings on Behalf of Util ML19323J0771980-05-19019 May 1980 Responds to NRC 800424 Ltr Re Violations Noted in IE Insp Repts 50-566/80-07 & 50-567/80-07.Corrective Actions:Purge Air Blower Filters & Solenoid Valve Cleaned ML19309H4951980-05-0505 May 1980 Forwards Second Interim Deficiency Rept Re Incorrect Use of Inertia Resulting in shear-related,cross-sectional Property Calculations for Control Bldg ML19309G4161980-04-28028 April 1980 Forwards Revised Response to Violation Noted in IE Insp Repts 50-566/80-03 & 50-567/80-03 Re Failure to Establish & Control Radiography.Film Interpreters & Radiographers Instructed in Shim Placement ML19312E3331980-04-28028 April 1980 Responds to NRC 800228 Ltr Re Violations Noted in IE Insp Repts 50-566/80-03 & 50-567/80-03.Corrective actions:800324 & 0421 Submittals revised.Re-evaluation of Radiographs Showed Only Seven Welds Will Require Reradiographing ML19344D6381980-04-21021 April 1980 Forwards First Interim Deficiency Rept Re Improper Documentation & Utilization of Computer Program Inertia. Next Rept Will Be Submitted by 800801 1988-08-29
[Table view] Category:INTERNAL OR EXTERNAL MEMORANDUM
MONTHYEARML20148N3841980-12-11011 December 1980 Forwards Geologic Rept Re Suggested Graben in Gravelly Springs,Al Area.Distance to Facilities Precludes Significance of Structures.Related Documentation Encl ML20197E5561980-02-0707 February 1980 Submits Reasonable Values for CP Environ Review Charges, Based on NRC Computer Printouts of Charges,Examination of Lab Monthly Repts & Info from Anl ML20150D2641978-11-14014 November 1978 Forwards Recent NRC Memos Re Problems Associated W/Pipe Support Base Plate Design Which Apply to Subj Facil.W/Encl ANO:7811020332,7811020343 & 7811020336 ML20148M8171978-11-0606 November 1978 Repts on Analysis Which Indicates post-LOCA Hydrogen Production Due to Corrosion of Matl Inside Primary Containment May Not Have Been Adequately Considered in Eval of Combustible Gas Control Sys ML20148M8261978-10-17017 October 1978 Repts on post-LOCA Hydrogen Production from Matl Inside Containment.Finds Effects Eval Re post-LOCA Generation of H in Both BWR & PWR Pressure Suppression Type Containments Do Not Lead to Significant New Safety Concerns.W/Encl Ref ML20147D6381978-09-29029 September 1978 During Semiscale Experiments Conducted to Model Aspects of ECCS Performance,One Test Run Showed Behavior Unanticipated by ECCS Models.Believed That Results Were Atypical.Matter Is Under Further Study.Bds Will Be Informed of Addl Info ML20128Q4821977-04-22022 April 1977 Forwards Review Summary for Use in Des.Economic Costs of Coal & Nuclear Power Generation Alternatives Addressed 1980-02-07
[Table view] Category:MEMORANDUMS-CORRESPONDENCE
MONTHYEARML20148N3841980-12-11011 December 1980 Forwards Geologic Rept Re Suggested Graben in Gravelly Springs,Al Area.Distance to Facilities Precludes Significance of Structures.Related Documentation Encl ML20197E5561980-02-0707 February 1980 Submits Reasonable Values for CP Environ Review Charges, Based on NRC Computer Printouts of Charges,Examination of Lab Monthly Repts & Info from Anl ML20150D2641978-11-14014 November 1978 Forwards Recent NRC Memos Re Problems Associated W/Pipe Support Base Plate Design Which Apply to Subj Facil.W/Encl ANO:7811020332,7811020343 & 7811020336 ML20148M8171978-11-0606 November 1978 Repts on Analysis Which Indicates post-LOCA Hydrogen Production Due to Corrosion of Matl Inside Primary Containment May Not Have Been Adequately Considered in Eval of Combustible Gas Control Sys ML20148M8261978-10-17017 October 1978 Repts on post-LOCA Hydrogen Production from Matl Inside Containment.Finds Effects Eval Re post-LOCA Generation of H in Both BWR & PWR Pressure Suppression Type Containments Do Not Lead to Significant New Safety Concerns.W/Encl Ref ML20147D6381978-09-29029 September 1978 During Semiscale Experiments Conducted to Model Aspects of ECCS Performance,One Test Run Showed Behavior Unanticipated by ECCS Models.Believed That Results Were Atypical.Matter Is Under Further Study.Bds Will Be Informed of Addl Info ML20128Q4821977-04-22022 April 1977 Forwards Review Summary for Use in Des.Economic Costs of Coal & Nuclear Power Generation Alternatives Addressed 1980-02-07
[Table view] Category:NRC TO ASLAP
MONTHYEARML20150D2641978-11-14014 November 1978 Forwards Recent NRC Memos Re Problems Associated W/Pipe Support Base Plate Design Which Apply to Subj Facil.W/Encl ANO:7811020332,7811020343 & 7811020336 1978-11-14
[Table view] |
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. p $ NUCLEAR REGULATORY COMMtsslON WASHINGTON, D C. 20555
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gC pyELIC D November 14, 1978
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Ivan W. Smith, Esq. , Chairman Mr. Lester Kornblith Atomic Safety and Licensing Board Atomic Safety and Licensing Board U.S. Nuclear Regulatory Commission U.S. Nuclear Regulatory Commission Washington, D. C. 20555 Washington, D. C. 20555 Dr. Oscar H. Paris Atomic Safety and Licensing Board E U.S. Nuclear Regulatory Commission Washington, D. C. 20555 \
In the Matter of E jB N2' ~
TENNESSEE VALLEY AUTHORITY (Yellow Creek Nuclear Plant, Units 1 "& 2)$ ggya N[ge .
Docket Nos. 50-566 & 50-567 geydy** 3 b
Gentlemen: m Enclosed are recent memoranda discussing certain problems experienced in connection with pipe support base plate design. The NRR Staff has informed us that the problems discussed in Mr. Stello's memorandum dated September 28, 1978 are applicable to the Yellow Creek facility, and that DSS is presently reviewing this aspect of piping design analysis on a case-by-case basis under SRP section 3.9.3 - ASME Codes 1, 2 and 3 Components, Component Supports and Core Support Structures. If the Board or any of the parties wish additional information, please let us know.
Sincerely, k .i.,,.f :h'
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Edward G. Ketchen Counsel for NRC Staff l
Enclosures as Stated l cc (w/encls.):
Ira L. Myers, M.D.
Atomic Safety and Licensing Board Panel Atomic Safety and Licensing Appeal Panel Docketing and Service Section Herbert S. Sanger, Jr. , Esq.
'- Honorable A. F. Summer Alton B. Cobb, M.D. .
William B. Hubbard, Esq. _
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r Milton J. Grossman, Hearing Division
Director and Chief Counsel, OELD FROM: Victor Stello, Jr,, Director Division of Operating Reactors, NRR -
SUBJECT:
BOARD NOTIFICATION - PIPE SUPPORT BASE PLATE DESIGN i
The attached memorandum ~.oger Mattson, dated June 28, 1978, presents information conc ning failures of safety-related pipe supports at Millstone 1 and design deficiencies on similar equip-ment at Shoreham Unit 1. As indicated in the attachment, two factors appeared to contribute to failure of anchor-bolt connec-tions of pipe supports, These are, 1) the design assumption that base plates perforn structurally as rigid load-bearing members when they may be flexible members, and 2) incorrect anchor bolt torquing.
Recent audits of Architectural Engineering firms and assessments of the actions taken at Millstone, as noted in the attachment, provided the following general information:
- 1. During the last few years, the A/Es have changed their design and installation procedures for concrete embedded pipe supports.
- 2. Past and current design and installation procedures vary among the A/Es,
- 3. In the past many of the pipe support designs have been con-tracted, and were done with methods not known by the principal A/Es.
We have concluded that the more detailed information required must be obtained from each operating facility, We are preparing a generic
Milton J. Grossman letter to each operating facili > requesting detailed design, installation, and testing inform > tion of concrete-embedded anchor-bolted pipe supports of safety-related equipment.
We recommend that this information be provided to the following Boards:
- 1. Monticello (FTL)
- 2. Indian Point 1,2,3 (Seismic Design)
We will provide an assessment of this issue upon completion of our evaluations. i
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Victor Stello, Jr., Director Division of Operating Reactors Office of Nuclear Reactor Regulation
Enclosure:
June 28,1978 memo, Stello to Mattson cc w/ enclosure:
D. Vassallo V. Stello R. Mattson R. Bevan L. 01shan
. L. Nichols l V. Noonan A. Schwencer T. Ippolito J. Fair
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MEMORANDUM FOR: B. K. Grimes, Assistant Director for Engineering and Projects, D0R '
D. G. Eisenhut, Assistant Director for Systems and Projects. 00R t
. FROM: Acitng Branch Chief, .
Engineering Branch, DDR ,
SUBJECT:
PIPE SUPPORT BASE PLATE PROBLEM The Engineering Branch, Division of Operating Reactors, has contacted Bechtel, Bergen - Paterson, Gilbert, and Stone & Webster in regard to their past and current design procedures for support base plates '
utilizing drilled anchor bolts. Bechtel and Stone & Webster indicated that they became aware of base plate flexibility effects on anchor bolt pull-out loads within the past couple of years and are now considering this in current designs. Gilbert and Bergen - Paterson indicated they are using rigid plate assumptions ,
for calculating bolt loads.
g Review of the support redesigns at Millstone shows a considerable increase in base plate thickness and anchor bolt sizes over the previous design. The original designs by Bergen - Paterson did not meet the current rigidity requirements used by Stone & Webster.
Design deficiency reports by Long Island Lighting Company on Shoreham show that consideration of base plate flexibility has increased the pull-out loads on some bolts, and inspection of the supports has shown that approximately 55 percent of the anchor bolts had incorrect embedment lengths.
Currently, I&E is considering whether Stone & Webster should be investigated for a Part 21 deviation and will be further investigating this matter.
The Engineering Branch considers the problem at Millstone where several support plates were pulled out to be a combination of base plate flexibility and anchor bolt design problems. Since the anchor bolts were never tested for cyclic loadings, and the lines at Millstone experienced flow induced vibrations, the capability of the anchor bolts to withstand cyclic loadings should be addressed, s
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f*.; h. K. Griacs .
D. G. Eisenhut
. 2-Based on the above infomation, the Engineering Branch recomends that this be considered a generic item for all operating plants, and a vendor inspection program be implemented with I&E to review the vendor design procedures used for analyzing support base plates ,
utilizing dHiled anchor bolts along with the field insta111ation procedures utilized in installing the anchor bolts. Also, the load rating techniques used by the anchor bolt manufacturers for cyclic ,
loadings should be reviewed. The Engineering Branch has talked with I&E and consider the vendor inspection program to be the most efficient method of completing the necessary review. The Engineering Branch estimates approximately 15 man-weeks will be required to review design procedures used by vendors and A/E firms. The
- Engineering Branch will set up a meeting with both AD's to detemine the interface between the Engineering Branch and I&E required to implement the review.
The Engineering Branch is in the process of preparing a feedback' memo to DSS on the base plate problem which is expected to be completed by June 9,1978.
AtisichkPl p 4 W V. S. floonan, Acting Branch Chief Engineering Branch Division of Operating Reactors ce: V. Stello, Jr., DOR W. Rutherford IE U. Potopous IE l
R. }iattson, DSS J. P. Vaight, DSS l R. Dosnak, DSS
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MEMORANDUM FOR: R. J. Mattson, Director .
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Division of Systems Safety FROM: Victor Stello, Jr., Director Division of Operating Reactors
SUBJECT:
OPERATING EXPERIENCE MEMORANDUM NO. 13 PIPE SUPPORT BASE PLATE PROBLEM PROBLb' Recently a ci' inservice inspections at Millstone Unit 1, structural failures of rh,,id pipe supports for class 2 safety equipment were observed. These inspections, recently implemented at Millstone, were conducted in accordance with Section XI of the ASME Code, as endorsed by regulation,10 CFR 50.55 a(g), in February 1976.
Several base-plate anchor bolts of pipe supports in the Core Spray and the Low Pressure Coolant Injection Systems at Millstone were not properly embedded; and, in some cases the anchor bolts were completely pulled out and no supporting function was provided.
Deficiency reports, in accordance with 10 CFR 50.55(e), filed by Long Island Lighting Company, on Shoreham Unit 1, indicate that design of base plates with drilled anchor bolts using rigid plate assumptions has resulted in underestimation of loads on some anchor bolts. Inspection of anchor bolt installetions at Shoreham has shown over fifty percent of the bolt installations were deficient. Supports for both piping systems and electrical raceways have been reported as deficient at Shoreham. ,
PRESUMED CAUSE 1
It is currently believed that two interacting factors contribute to the failure of the supports. First, the design assumption that the base plates perform structurally as rigid instead of flexible members may provide low estimates of imposed loads on the supports.
Secondly, incorrect anchor bolt embedment may also contribute to insufficient support.
(
) The attached memoraridum from V. Noonan to B. Grimes, dated i June 2, 1978, provides additional information.
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1 SAFETY SIGNIFICANCE Depending on equipment layout, improperly designed or installed anchor supports could:
- 1. result in loss of support function in some cases; and,
- 2. result in high stressing of piping systems during a seismic event or during a significant flow transient.
REPAIR Millstone with assistance from Teledyne Engineering has completed design modifications and repairs. These changes include increased base plate thickness and larger anchor bolts for failed supports Shoreham in conjunction with Stone and Webster is evaluating both piping and electrical type supports. The review is scheduled to be completed by December, 1978.
00R ACTION
< 1he Engineering Branch will review the design procedures used on operating plants to determine anchor bolt loads, the techniques used to determine load ratings for anchor bolts, and the installation procedures.
This review will be done through an A/E vendor inspection audit in conjunction with IE. These A/E audits will be started during early July, 1978.
We anticipate that criteria will be developed for design and installation of base plate-anchor bolt assemblies, and those operating plants requiring corrective action will be identified.
f Additionally EB staff will further assess the occurrence and corre'ctive actions taken at Millstone.
RECOMMEt!DATIONS We recommend that this problem be addressed on all CP and OL reviews.
At this time it appears that considerations should be given to the analytical methods used to determine whether or not base plates behave as flexible or rigid members. This in turn may effect the anchor bolt size and embedcent to properly copa with loads imposed on the supports.
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It may be appropriate to require that applicants provide for review their: ,
- 1. methods for determining base plate thickness and anchor bolt loads;
- 2. criteria for anchor bolt installation; and,
- 3. criteria for load rating techniques for anchor bolts, including cyclic loads.
We shall coordinate our meetings, discussions and evaluations of this issue with your staff. Supplemental information will be provided.
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') 1 Vic' tor Stello, Jr., Director Division of Operating Reactors PRINCIPAL D0R PERSONNEL Reviewer: J. Fair
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Enclosure:
Memorandum dated 6/2/78 cc: w/ enclosure E. G. Case S. Hanauer R. S. Boyd H. R. Denton F. Schroeder DSS AD's DDR AD's D0R BC's 00R SL's J. Fair l
W . Nichols t W. Rutherford
- J. Sniczek l
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