Discusses Potential Shrinkage Flaws in Feedwater Check Valve Bodies.If Valve Body Insps Disclose That Internal Shrinkage Cracks Have Propagated to Either Surface,Valves Should Be Replaced Per NUREG-0991 (Ser).Related Info EnclML20203L541 |
Person / Time |
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Site: |
Limerick, 05000000 |
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Issue date: |
03/21/1986 |
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From: |
Rehm T NRC OFFICE OF THE EXECUTIVE DIRECTOR FOR OPERATIONS (EDO) |
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To: |
Joseph Austin Office of Nuclear Reactor Regulation |
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Shared Package |
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ML20203L508 |
List: |
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References |
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FOIA-86-126, FOIA-86-127, FOIA-86-131, FOIA-86-166, FOIA-86-201, FOIA-86-209, FOIA-86-263, FOIA-86-80, FOIA-86-82, RTR-NUREG-0991, RTR-NUREG-991 NUDOCS 8608270381 |
Download: ML20203L541 (7) |
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Category:INTERNAL OR EXTERNAL MEMORANDUM
MONTHYEARML20211D1001999-08-20020 August 1999 Notification of 990908 Meeting with Util to Discuss Status of Limerick & Peach Bottom Licensing Issues.Meeting Held in Rockville,Md ML20207F2731999-05-25025 May 1999 Notification of 990609 Meeting with PECO Energy in Linfield, Pennsylvania to Discuss Results of Plant Performance Review of Limerick Issued on 990409 ML20205F9901999-04-0202 April 1999 Notification of 990419 Meeting with Util in Rockville,Md to Discuss Schedule for Completion of Installation of Fire Barriers at Plant ML20196J9851998-12-0808 December 1998 Notification of 981218 Meeting with Util in Rockville,Md to Plant Licensing Issues ML20155G7751998-11-0404 November 1998 Notification of 981118 Meeting with Util in Rockville,Md to Discuss Limerick Generating Station,Units 1 & 2 & Peach Bottom Atomic Power Station,Units 2 & 3 Ampacity Validation Analyses ML20216C4501998-05-12012 May 1998 Notification of 980610 Meeting 98-51 W/Util in King of Prussia,Pa to Discuss Diesel Generator Failure & HPCI Exhaust Valve Failure & RHR Min Flow Valve Predecisional Enforcement Conference ML20216C4351998-04-15015 April 1998 Notification of 980527 Meeting W/Peco Energy Co in King of Prussia,Pennsylvania to Discuss Diesel Generator Failure & HPCI Exhaust Valve Failure & RHR Min Flow Valve Failure Predecisional Enforcement Conference IR 05000352/19980011998-03-0909 March 1998 Forwards NRC Operator Licensing Exam Repts 50-352/98-01 & 50-353/98-01 for Exams Administered on 980120-23 ML20210K3001997-08-15015 August 1997 Notification of 970820 Meeting W/Util in North Bethesda,Md to Discuss Plants Project Mgt Issues Including Planned TSs Submittals & Generic Licensing Issue Status ML20217H1991997-08-0606 August 1997 Forwards Signed Original of Order Prohibiting Involvement in NRC-licensed Activities (Effective Immediately) for Transmittal to Ofc of Fr,For Publication.W/O Encl ML20151L7771997-08-0101 August 1997 Notification of Meeting W/Peco Energy Co on 970805 in Rockville,Md to Discuss Plans & Schedules for Resolving thermo-lag Fire Barrier Issues at Mentioned Plants ML20148F7201997-05-30030 May 1997 Forwards Semiannual Status Rept on Fire Protection Task Action Plan & plant-specific Thermo-Lag Correction Action Programs ML20148E3591997-05-28028 May 1997 Notification of Significant Licensee Meeting 97-62 W/Util on 970602 to Discuss Issues Associated W/Inaccurate Records Relating to Fire Protection & Chemistry Surveillance Results ML20137Z8881997-04-21021 April 1997 Forwards NRC Approved Operator Licensing Exam (Facility Outline & Initial Exam Submittal) for Tests Administered on 970120-24 ML20137Z8141997-04-21021 April 1997 Forwards NRC Approved Operator Licensing Exam (as-given Operating Exam) for Tests Administered on 970120-24 ML20137G7241997-03-25025 March 1997 Corrects Notification of 970414 Meeting W/Util in Bethesda, MD to Discuss Util Plans & Schedules for Resolution of Thermo-Lag Fire Barrier Issues at Plants ML20203C0741997-03-17017 March 1997 Discusses OI Rept 1-96-033 Re Alleged Falsification of Fire Protection Surveillance Test Documentation.Requests That OGC Analyze Rept & Determine If Sufficient Evidence for Action. EA-97-115 Assigned to Track Case ML20136G0391997-03-13013 March 1997 Notification of 970414 Meeting W/Util in North Bethesda,Md to Discuss PECO Plans & Schedules for Resolution of Thermo Lag Fire Barrier Issues at Peach Bottom & Limerick ML20132A8991996-12-12012 December 1996 Forwards Background Document Re Event Rept on Fire Protection Analysis Assumptions for Safety Relief Valve Operation,For Plant,Units 1 & 2 ML20129K2561996-11-0505 November 1996 Notification of Significant Licensee Meeting 96-109 W/Listed Attendees on 961202-03 in Philadelphia,Pa to Provide Training,Resolve Interagency Exercise Scheduling Conflicts & Discuss Current Issues in Emergency Preparedness ML20129B5541996-10-18018 October 1996 Notification of 961025 Meeting W/Util in Delta,Pa to Discuss Status of Open & Planned Licensing Actions for Pbaps,Units 2 & 3 & Limerick Generating Station,Units 1 & 2 ML20134K5771995-12-0505 December 1995 Forwards NRC Approved Operator Licensing Exam (Facility Outline & Initial Exam Submittal & as-given Operating Exam) for Tests Administered on 951113-16 ML20149J1451994-12-22022 December 1994 Notification of Significant Licensee Meeting 94-149 W/Util on 950109 in King of Prussia,Pa to Discuss Upcoming Unit 2 Outage & Changes in Health Physics Organization NUREG-1299, Forwards Continuation of Curtiss Papers to Be Filed Under Commission Correspondence in Pdr.Advanced Copy Sent to Pdr. List of Documents Included in Four Boxes Encl1994-06-29029 June 1994 Forwards Continuation of Curtiss Papers to Be Filed Under Commission Correspondence in Pdr.Advanced Copy Sent to Pdr. List of Documents Included in Four Boxes Encl ML20058K1571993-12-0606 December 1993 Notification of 931214 Meeting W/Util in Rockville,Md to Discuss Risk of Performing EDG 24 Hr Testing at Power ML20059K7201993-11-0808 November 1993 Notification of Significant Licensee Meeting 93-145 W/Util on 931124 in Limerick,Pa to Discuss SALP Mgt Meeting ML20059K2711993-11-0303 November 1993 Discusses 931027 Operating Reactors Events Briefing Conducted to Inform Senior Managers from Listed Ofcs of Selected Events That Occurred Since Last Briefing on 931020. List of Attendees Encl ML20057F8771993-10-14014 October 1993 Notification of 931103 Meeting W/Util in Rockville,Md to Discuss Certain Cost Beneficial Licensing Actions ML20057F1511993-10-0808 October 1993 Notification of 931019 Meeting W/Util in Rockville,Md to Discuss MOV Testing Program ML20057F4341993-10-0606 October 1993 Notification of 931014 Significant Licensee Meeting 93-129 W/Util in King of Prussia,Pa to Discuss Power Oscillation Issue Which Was Subj of Notice of Deviation ML20057D2721993-09-24024 September 1993 Notification of Significant Licensee Meeting 93-125 W/Util on 931004 in King of Prussia,Pa to Discuss 13 Kv Cable Fault During Excavation on 930907 ML20057C1161993-09-17017 September 1993 Notification of 931001 Significant Licensee Meeting 93-125 in King of Prussia,Pa to Discuss 13 Kv Cable Fault During Excavation on 930907 ML20056G8501993-08-25025 August 1993 Notification of Significant Licensee Meeting 93-113 W/Util on 930908 to Discuss Transfer of Fuel from Shoreham to Limerick ML20056E0461993-08-17017 August 1993 Notification of 930824 Meeting W/Util in Rockville,Md to Discuss Control & Maint Qualifications & License Status for Lsros to Fuel Handling Licensed at Pbaps,Units 2 & 3 & LGS, Units 1 & 2 ML20128P5341993-02-19019 February 1993 Notification of 930225 Meeting W/Util in Wayne,Pa to Discuss Evaluation for Conversion to 24-month Fuel Cycle from Current 18-month Period ML20128P5561993-02-12012 February 1993 Notification of Significant Licensee Meeting 93-19 W/Util on 930226 to Discuss QA Change Request for Facilities ML20127L0861992-12-29029 December 1992 Notification of Significant Licensee Meeting 92-188 on 930107 in King of Prussia,Pa to Discuss Common Emergency Plan for Plants ML20126C3521992-12-16016 December 1992 Notification of Significant Licensee Meeting 92-183 W/Util on 930112 to Conduct Enforcement Conference for Edsfi ML20126C3931992-12-15015 December 1992 Notification of Significant Licensee Meeting 92-182 W/Util on 921222 to Discuss Continuing Problems W/Maintenance Procedures ML20126H2791992-12-11011 December 1992 Notification of Significant Licensee Meeting 92-181 W/Util on 921218 to Discuss Failed Fuel Reliability ML20126B4721992-12-10010 December 1992 Notification of Significant Licensee Meeting 92-180 W/Util on 921218 to Discuss Needs Program.Meeting Closed to Public Due to Sensitive Personnel Related Issues ML20198E3331992-11-24024 November 1992 Notification of 921201 Meeting W/Util in Rockville,Md to Discuss Licensing Activities ML20062H0281990-11-20020 November 1990 Notification of Significant Licensee Meeting 90-138 W/Util on 901128 to Discuss SALP Board Meeting ML20062F3981990-11-0909 November 1990 Notification of Significant Licensee Mgt Meeting 90-134 W/ Util on 901120 at Region I Ofc to Discuss Early Retirement Program ML20055C3521990-02-26026 February 1990 Notification of 900305 Meeting W/Util in Rockville,Md to Discuss Status of Licensing Activities for Facility ML20248E9391989-09-29029 September 1989 Forwards AEOD Technical Review Rept on Debris in Containment Recirculation Pumps.No Occurrences Found to Involve Actual Accumulation of Debris in Containment Sumps.Immediate Corrective Actions Completed ML20248C8311989-09-20020 September 1989 Request for Hearing by Alchemie.* Forwards Response & Request for Hearing,In Response to NRC 890818 Order Modifying License & Order to Show Cause Why Licenses Should Not Be Revoked,For Appropriate Action ML20247H9261989-09-0909 September 1989 Advises That SALP Meeting for Facilities Scheduled for 891115.Assessment Input Should Be Submitted by 891016 ML20246J2361989-08-28028 August 1989 Forwards Draft Preliminary Assessment of BWR Mark II Containment Challenges,Failure Modes & Potential Improvement in Performance 1999-08-20
[Table view] Category:MEMORANDUMS-CORRESPONDENCE
MONTHYEARML20211D1001999-08-20020 August 1999 Notification of 990908 Meeting with Util to Discuss Status of Limerick & Peach Bottom Licensing Issues.Meeting Held in Rockville,Md ML20207F2731999-05-25025 May 1999 Notification of 990609 Meeting with PECO Energy in Linfield, Pennsylvania to Discuss Results of Plant Performance Review of Limerick Issued on 990409 ML20205F9901999-04-0202 April 1999 Notification of 990419 Meeting with Util in Rockville,Md to Discuss Schedule for Completion of Installation of Fire Barriers at Plant ML20196J9851998-12-0808 December 1998 Notification of 981218 Meeting with Util in Rockville,Md to Plant Licensing Issues ML20155G7751998-11-0404 November 1998 Notification of 981118 Meeting with Util in Rockville,Md to Discuss Limerick Generating Station,Units 1 & 2 & Peach Bottom Atomic Power Station,Units 2 & 3 Ampacity Validation Analyses ML20216C4501998-05-12012 May 1998 Notification of 980610 Meeting 98-51 W/Util in King of Prussia,Pa to Discuss Diesel Generator Failure & HPCI Exhaust Valve Failure & RHR Min Flow Valve Predecisional Enforcement Conference ML20216C4351998-04-15015 April 1998 Notification of 980527 Meeting W/Peco Energy Co in King of Prussia,Pennsylvania to Discuss Diesel Generator Failure & HPCI Exhaust Valve Failure & RHR Min Flow Valve Failure Predecisional Enforcement Conference IR 05000352/19980011998-03-0909 March 1998 Forwards NRC Operator Licensing Exam Repts 50-352/98-01 & 50-353/98-01 for Exams Administered on 980120-23 ML20210K3001997-08-15015 August 1997 Notification of 970820 Meeting W/Util in North Bethesda,Md to Discuss Plants Project Mgt Issues Including Planned TSs Submittals & Generic Licensing Issue Status ML20217H1991997-08-0606 August 1997 Forwards Signed Original of Order Prohibiting Involvement in NRC-licensed Activities (Effective Immediately) for Transmittal to Ofc of Fr,For Publication.W/O Encl ML20151L7771997-08-0101 August 1997 Notification of Meeting W/Peco Energy Co on 970805 in Rockville,Md to Discuss Plans & Schedules for Resolving thermo-lag Fire Barrier Issues at Mentioned Plants ML20148F7201997-05-30030 May 1997 Forwards Semiannual Status Rept on Fire Protection Task Action Plan & plant-specific Thermo-Lag Correction Action Programs ML20148E3591997-05-28028 May 1997 Notification of Significant Licensee Meeting 97-62 W/Util on 970602 to Discuss Issues Associated W/Inaccurate Records Relating to Fire Protection & Chemistry Surveillance Results ML20137Z8881997-04-21021 April 1997 Forwards NRC Approved Operator Licensing Exam (Facility Outline & Initial Exam Submittal) for Tests Administered on 970120-24 ML20137Z8141997-04-21021 April 1997 Forwards NRC Approved Operator Licensing Exam (as-given Operating Exam) for Tests Administered on 970120-24 ML20137G7241997-03-25025 March 1997 Corrects Notification of 970414 Meeting W/Util in Bethesda, MD to Discuss Util Plans & Schedules for Resolution of Thermo-Lag Fire Barrier Issues at Plants ML20203C0741997-03-17017 March 1997 Discusses OI Rept 1-96-033 Re Alleged Falsification of Fire Protection Surveillance Test Documentation.Requests That OGC Analyze Rept & Determine If Sufficient Evidence for Action. EA-97-115 Assigned to Track Case ML20136G0391997-03-13013 March 1997 Notification of 970414 Meeting W/Util in North Bethesda,Md to Discuss PECO Plans & Schedules for Resolution of Thermo Lag Fire Barrier Issues at Peach Bottom & Limerick ML20132A8991996-12-12012 December 1996 Forwards Background Document Re Event Rept on Fire Protection Analysis Assumptions for Safety Relief Valve Operation,For Plant,Units 1 & 2 ML20129K2561996-11-0505 November 1996 Notification of Significant Licensee Meeting 96-109 W/Listed Attendees on 961202-03 in Philadelphia,Pa to Provide Training,Resolve Interagency Exercise Scheduling Conflicts & Discuss Current Issues in Emergency Preparedness ML20129B5541996-10-18018 October 1996 Notification of 961025 Meeting W/Util in Delta,Pa to Discuss Status of Open & Planned Licensing Actions for Pbaps,Units 2 & 3 & Limerick Generating Station,Units 1 & 2 ML20134K5771995-12-0505 December 1995 Forwards NRC Approved Operator Licensing Exam (Facility Outline & Initial Exam Submittal & as-given Operating Exam) for Tests Administered on 951113-16 ML20149J1451994-12-22022 December 1994 Notification of Significant Licensee Meeting 94-149 W/Util on 950109 in King of Prussia,Pa to Discuss Upcoming Unit 2 Outage & Changes in Health Physics Organization NUREG-1299, Forwards Continuation of Curtiss Papers to Be Filed Under Commission Correspondence in Pdr.Advanced Copy Sent to Pdr. List of Documents Included in Four Boxes Encl1994-06-29029 June 1994 Forwards Continuation of Curtiss Papers to Be Filed Under Commission Correspondence in Pdr.Advanced Copy Sent to Pdr. List of Documents Included in Four Boxes Encl ML20058K1571993-12-0606 December 1993 Notification of 931214 Meeting W/Util in Rockville,Md to Discuss Risk of Performing EDG 24 Hr Testing at Power ML20059K7201993-11-0808 November 1993 Notification of Significant Licensee Meeting 93-145 W/Util on 931124 in Limerick,Pa to Discuss SALP Mgt Meeting ML20059K2711993-11-0303 November 1993 Discusses 931027 Operating Reactors Events Briefing Conducted to Inform Senior Managers from Listed Ofcs of Selected Events That Occurred Since Last Briefing on 931020. List of Attendees Encl ML20057F8771993-10-14014 October 1993 Notification of 931103 Meeting W/Util in Rockville,Md to Discuss Certain Cost Beneficial Licensing Actions ML20057F1511993-10-0808 October 1993 Notification of 931019 Meeting W/Util in Rockville,Md to Discuss MOV Testing Program ML20057F4341993-10-0606 October 1993 Notification of 931014 Significant Licensee Meeting 93-129 W/Util in King of Prussia,Pa to Discuss Power Oscillation Issue Which Was Subj of Notice of Deviation ML20057D2721993-09-24024 September 1993 Notification of Significant Licensee Meeting 93-125 W/Util on 931004 in King of Prussia,Pa to Discuss 13 Kv Cable Fault During Excavation on 930907 ML20057C1161993-09-17017 September 1993 Notification of 931001 Significant Licensee Meeting 93-125 in King of Prussia,Pa to Discuss 13 Kv Cable Fault During Excavation on 930907 ML20056G8501993-08-25025 August 1993 Notification of Significant Licensee Meeting 93-113 W/Util on 930908 to Discuss Transfer of Fuel from Shoreham to Limerick ML20056E0461993-08-17017 August 1993 Notification of 930824 Meeting W/Util in Rockville,Md to Discuss Control & Maint Qualifications & License Status for Lsros to Fuel Handling Licensed at Pbaps,Units 2 & 3 & LGS, Units 1 & 2 ML20128P5341993-02-19019 February 1993 Notification of 930225 Meeting W/Util in Wayne,Pa to Discuss Evaluation for Conversion to 24-month Fuel Cycle from Current 18-month Period ML20128P5561993-02-12012 February 1993 Notification of Significant Licensee Meeting 93-19 W/Util on 930226 to Discuss QA Change Request for Facilities ML20127L0861992-12-29029 December 1992 Notification of Significant Licensee Meeting 92-188 on 930107 in King of Prussia,Pa to Discuss Common Emergency Plan for Plants ML20126C3521992-12-16016 December 1992 Notification of Significant Licensee Meeting 92-183 W/Util on 930112 to Conduct Enforcement Conference for Edsfi ML20126C3931992-12-15015 December 1992 Notification of Significant Licensee Meeting 92-182 W/Util on 921222 to Discuss Continuing Problems W/Maintenance Procedures ML20126H2791992-12-11011 December 1992 Notification of Significant Licensee Meeting 92-181 W/Util on 921218 to Discuss Failed Fuel Reliability ML20126B4721992-12-10010 December 1992 Notification of Significant Licensee Meeting 92-180 W/Util on 921218 to Discuss Needs Program.Meeting Closed to Public Due to Sensitive Personnel Related Issues ML20198E3331992-11-24024 November 1992 Notification of 921201 Meeting W/Util in Rockville,Md to Discuss Licensing Activities ML20062H0281990-11-20020 November 1990 Notification of Significant Licensee Meeting 90-138 W/Util on 901128 to Discuss SALP Board Meeting ML20062F3981990-11-0909 November 1990 Notification of Significant Licensee Mgt Meeting 90-134 W/ Util on 901120 at Region I Ofc to Discuss Early Retirement Program ML20055C3521990-02-26026 February 1990 Notification of 900305 Meeting W/Util in Rockville,Md to Discuss Status of Licensing Activities for Facility ML20248E9391989-09-29029 September 1989 Forwards AEOD Technical Review Rept on Debris in Containment Recirculation Pumps.No Occurrences Found to Involve Actual Accumulation of Debris in Containment Sumps.Immediate Corrective Actions Completed ML20248C8311989-09-20020 September 1989 Request for Hearing by Alchemie.* Forwards Response & Request for Hearing,In Response to NRC 890818 Order Modifying License & Order to Show Cause Why Licenses Should Not Be Revoked,For Appropriate Action ML20247H9261989-09-0909 September 1989 Advises That SALP Meeting for Facilities Scheduled for 891115.Assessment Input Should Be Submitted by 891016 ML20246K4101989-08-31031 August 1989 Staff Requirements Memo on Commission 890825 Affirmation/ Discussion & Vote in Rockville,Md Re Immediate Effectiveness Review for Full Power OL 1999-08-20
[Table view] |
Text
~
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. -'*- +
i*
[ o g UNITED STATES F" n NUCLEAR REGULATORY COMMISSION h WASHINGTON, D. C. 20555
+
..... MAR 211986 Docket Nos.: 50-352
. 50-353 ;
i MEMORANDUM FOR: JohnH.Abstin,TechnicalAssistant to Commissioner Asselstine FROM: T. A. Rehm Assistant for Operai.ioas, ED0
SUBJECT:
LIMERICK COMPLIANCE WITH GDC-51 In your memorandum to me dated February 28, 1986, you requested certain information with respect to a particular staff input for the Limerick Safety Evaluation Report and several subsequent letters from the Philadelphia Electric Company (PECo) in 1984. The documents deal with potential shrinkage flaws in feedwater check valve bodies. We believe that this issue was appropriately resolved and that there was no compromise of the staff's safety review procedures. The following discussion which includes some pertinent background information, will serve to place this issue in the proper perspective, and should provide the information you requested.
During the staff's review of the Final Safety Analysis Report for the Limerick Generating Station in 1983 and 1984, the staff determined that two cast bodies for the feedwater check valves contained shrinkage cracks that could compromise the valves' conformance with GDC-51 if the cracks were to propagate while in service. Such propagation of the shrinkage
. cracks has also occurred in the past and has been documented for similar valves at other plants. After a fracture mechanics evaluation was com-pleted and submitted by PECo for the staff's review, an independent fracture mechanics evaluati6. was performed by the NRC staff. It was determined by the staff that a special inservice inspection of these valve ~ bodies (valve IF074 A and B) would be required.
The resolution of this issue is addressed in the NRC staff's input to the SER, dated September 18, 1984, two PEco letters dated October 4 and 12, 1984, and Supplement No. 3 to the Limerick SER (NUREG-0991) issued in October 1984. Specifically, the supplement to the SER stated that:
"We have concluded from these calculations that although the valve body may not quite meet the Appendix G requirements, even our most conservative approach still shows some safety mar Adequate margin against failure (at least a factor of two) gin. will exist under the most probable loading conditions.
Contact:
R. E. Martin x29472 8608270381 860826 y PDR FOIA gT/
GARDE 86-80 PDR -
i
These conclusions assume that the flaw size assumed will not be exceeded significantly. However, service experience on similar castings has disclosed that normal, acceptable shrinkage may be extended by cracking
, during service. We, therefore, recommended to the applicant that these valves be inspected for surface cracks on the inside and outside surfaces at the first refueling outage and at other times when the valve is disassembled for maintenance. The applicant has committed, by . letter dated October 12, 1984, to including this augmented inspection by surface examination or other methods acceptable to the staff, which will be determined during the staff's review of the inservice inspection program.
We have concluded that the results of our evaluation and the augmented inservice inspection program for these valves will provide reasonable assurance of compliance with the requirements of GDC-51. It will be confirmed by the augmented ISI that the shrinkage flaws existing in the valve bodies on entering service have not propagated to either of the surfaces. Should the augmented ISI disclose that these flaws have propagated to either of the surfaces, the valves are then to be replaced by the licensee."
With respect to the issue raised by the PECo letter of October 4,1984, i.e., whether a surface crack of up to 3.5 inches in length would be acceptable, the staff's position has been and continues to be that if the valve body inspections disclose that internal shrinkage cracks have propagated to either surface, the valves are to be replaced, regardless of the length of the surface indication.
It should be noted that the alternative approach proposed by PECo in its letter of October 4,1984, was found to be unacceptable by the staff and PECo was so informed; whereupon, the PECo proposed approach described in its letter dated October 12, 1984, was submitted and determined to be acceptable. The staff findings reflected in the September 18, 1984, staff memorandum referred to in your memorandum were included in SSER-3, as discussed above. There has been no change in the staff's position from that stated in SSER-3.
. . 'm .
Assistant for Operations, ED0 cc: P. Polk C. Acer J. Myer M. Clausen OPE OGC SECY
. .** r 1 (3)
Stu~dsvik Datum - Date Var referens - Our reference 4 1985-12-31 RN/CH Handleggere - Metter handled by Ert datum - Your date Er refe-ens - Your reference
. Re: Marviken Intermediate Programmes (MXIP)
- July 1st - December 31st 1985.
LETTER ACREEMENT P BLE Following the outcome of deliberations at the MX-V-ATT
- Project Board meeting on June lith, 1985 (reference to PROTOKOLL PB 2/85 NorrkBping) STUDSVIK ENERGITEKNIK AB (herein called STUDSVIK) issued through the chairman of the MX-V-ATT Project Board an invitation letter of June
'i 28th, 1985, to the MX-V-ATT Parties to participate in and
'f financially support the Marviken Intermediate Programmes
- 'E MXIP consisting of three items, namely A) Marviken ATT t; Facility Standby, B) Organization and perfonnance of an iI Ad-hoc Working Group - assisted by a Technical Secretariat -
){ for analysis and assessment of the need of further aerosol Q transport tests using the Marviken Facility, and C) Experimenta TE and studies on specific phenomena which would mainly I contribute to the enderstanding of the findings of the ATT 1arge scale experiments (" Package 1").
[J - .
j,
,r ~~~
The above items A) and C) Package 1 were described in the y document MXIP-1001 (Appendix to the June 28th letter).
Pt Further details on Package 1 work items were provided Ff* in the reports MXIP-1, -2, -4, -5, all dated 1985-08-29, and MXIP-3, dated 1985-09-17.
- E fh The mandate and performance of item B) Ad-hoc Working
+l Group was described in the document MXIP-1003 (Appendix to
,; the June 28th letter).
.I ht
_.; AGREEMENT BASIS Th'e total cost for A), B) and C) together - including all
-- operations and final reporting - was ESEK 4640. After the first formation of A), B) and C) items a strong wish by the ATT parties that an earlier discussed upgrading of an ATT internal corium shakedown report should be undertaken, introduced a new cost amounting to KSEK 320.
B
/
/
1985-12-31 2 (3)
The technical priorities for work-items within item C)
" Package 1" with respect to the expected usefulness of results in relation to efforts and costs have been
- successively discussed and refined, the technical content now being summarized after observations at the October 16th ATT TAC meeting (reference is made to TAC meeting minutes 2/:85). The final approach is that C) Package 1 as itemized after the technical modifications is still to be performed wi' thin the cost frame of KSEK 2965 (Appendix I).
-- The properly amended corium shakedown report costed to KSEK 320 and described by report MXIP-6, dated 1985-09-13, should be presented along with the final reporting of
- i MXIP Psckage 1.
- i
,f The MXIP operations are scheduled for finalization at the
.! end of 1985, except that work with final reporting has to be pursued for some time into early 1986.
[{6 Ej The identified costs for the total MXIP proper hence remain to be KSEK 4960 which is postulated to be a firm E.
EE amount, as are the cost elements for A) 1050, B) 625, for
- ~j C) 2965, and D) KSEK 320.
-? j
{ ATT Parties having declared interest and firm intent to
}
par'icipate in and financially support MXIP are: OH, VTT, L:s CEA, EDF, ENEA, JG, KEMA, SKI, UKAEA, EPRI, NRC and STUDSVIK.
C.t
.I MX1 operations were started on July 1st 1985 and on the I bai.s of delared interest and firm intent from ATT Parties j fp a decision to pursue operations was announced to the Parties on August 12th, 1985, by telex message to the t . Parties.
L The general provisions of the MX-V-ATT project sgreement
,3 of 1982-12-08 apply if not otherwise stated in this l
[T present agreement including its preamble and agreement l . I basis or do not apply with respect to the content, duration i
and other circumstances obviously different from the ATT l project profile.
Obligations and rights with respect to results and information remain the same.
l 1
~
sn a
1 3 l 1
M 1985-12-31 3 (3)
AGREEMENT Now, as United States Nuclear Regulatory Commission, USA
.. (herein called NRC) has given a declaration of interest and firm intent to be a Party to MXIP operations and as al,1 other parties listed in the MX-V-ATT Project Agreement of 1982-12-08 are expected to join MXIP the following agreement is entered into between NRC and STUDSVIK ENERGITEKNIK AB, Sweden: l NRC. will have access to the MXIP operations and results in items A), B), C) and D) - upgraded corium shakedown report - on terms and conditions stated in the ATT Project
.$ Agreement of 1982-12-08 if not otherwise stated in this i letter agreement and further notes:
! - The total amount to be invoiced to NRC by
- j STUDSVIK for th'e MXIP project is KSEK 615 t- e, based upon the NRC share 12.4 % of KSEK 4960.
[~
Invoicing shall be made in one step during December, 1985 and payment shall be made in F accordance with ATT rules i.e. within 60 days.
a,
" - STUDSVIK undertakes to conclusively / perform the scheduled items A), C) and D) as close to g.. .g agreed schedule as possible. STUDSVIK will also a Lg try to f acilitate item B) Working Group (including d Technical Secretariat) operations. STUDSVIK cannot be made liable for delays or other
']
' changes in the work and its resalts deriving Ih' from majority ruling of the other Parties h (other than STUDSVIK and NRC).
"e - Should finally such lack of financing from
( other Parties occur that would seriously harm
! I
- i. the performance of the programme, STUDSVIK is liable to inform NRC without undue delay.
' STUDSVIK and NRC shall together with the other Parties assess the situation in accordance with ruling of the MX-V-ATT Agreement.
Done on December 1985.
i l
For For United States Nuclear STUDSVIK ENERGITEKNIK AB Regulatory Commissio ,
l
, g.,
c Q f
/
I C 1
i
, . . e 1985-11-27 APPENDIX I:1 (2) e*
MARVIKEN IlfrERMEDIATE PROGRXWES, MKIP ITEM C) PACKAGE 1 At the ATT PB 2/85 meeting the Board decided that the Marviken facility should be kept in stand-by status to
- December 31st, 1985. During the stand-by additional experiments and investigations are carried out to support
! ari~ improved understanding of the acquired ATT results (see MXIP-1001). The investigations utilize equipment and personnel from the ATT Project and comprise the following progran items described in the reports MX1P-I
- through 5:
E 6
i -
Carbon release from the corium chamber during
( operation. (Graphite issue, MXIP-1).
Particle size evaluation and analysis (MXIP-2).
Resuspension phenomena'under typical ATT conditions.(MXIP-3).
Flow pattern studies in the reactor vessel and g at the pressurizer outlet (MXIP-4).
Formation of stable chemical compounds in
% the facility during the tests carried out.
1 (Chemical effects MXIP-5).
a i The individual items in this Package 1 programme have j been subject to detailed discussions concerning their 5 importance with respect to ATT oriented verifications and
.[
7 their technical feasability within the limitations of b equipment available. In consideration of the very narrow
~
.. tiime schedule the review activities have been performed la parallel to the preparatory work at the MXIP test facility.
, Sununarizing the discussions within the ATT TAC and MXIP Working Group led mid-October to the following underlining of relative importance of the individual items:
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1
(, -
- 1985-11-27 APPENDIX I:2 (2) 4
- Particle size studies should be given high
, priority and be supported with best available resources.
- Resuspension test data have a lesser importance for the time being and tests-should be performed simultaneously with particle size testing to
- minimize expense.
Flow pattern data are of great importance. The 4
present investigations could provide qualitative
- support to the ATT data.
- Chemical effects studies are given high priority and should be performed as planned.
~ t-The cost for the major part of the Package 1 program is l*[
,i essentially composed of two categories namel'y a) costs i
for the MXIP facility and perparatory work with insignificant i
$ sensitivity as to the number of tests planned for individual items, b) particular costs tied to the performance of individual tests.
7 ,
i m.
The discussed and implemented modifications in the program g are essentially leading to a transfer of particular costs y from one item to another. The Package 1 cost (KSEK 2965) li. earlier calculated and offered with respect to resources being made available for the period July 1st - December
,[
31st, 1985, will allow the modified Package 1 program to be
!I concluded in a timely manner. The final reports will to appear early 1986.
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