ML20239A110
| ML20239A110 | |
| Person / Time | |
|---|---|
| Issue date: | 09/02/1998 |
| From: | Carpenter C NRC (Affiliation Not Assigned) |
| To: | Sullivan E NRC (Affiliation Not Assigned) |
| References | |
| NUDOCS 9809080225 | |
| Download: ML20239A110 (6) | |
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{ NUCLEAR REGULATORY COMMIS810N l wAsHWeTON, D.C. 3000HWH "g\ September 2, 1998 MEMORANDUM TO: Edmund J. Sullivan, Acting Chief Materials and Chemical Engineering Branch Division of Engineering FROM: C. E. Carpenter, Jr., Lead Project Manager Materials and Chemical Engineering Branch Division of Engineering
SUBJECT:
MEETING
SUMMARY
FOR AUGUST 20,1998, MEETING WITH BOILING WATEH REACTORS VESSEL AND INTERNALS PROJECT 1
(BWRVIP) REGARUING STATUS OF BWRVIP REVIEWS On Thursday, August 20,1998, the U.S. Nucitar Regulatory Commission (NRC) staff participated in a public meeting with members of the Boiling Water Reactors Vessel and Intemals Project (BWRVIP) at the NRC's Rockville, MD, Headquarters to discuss the status of the various BWRVIP documents that have been submitted and are planned to be submitted, and the staff's review of the BWRVIP submittals. Attachment 1 is the August 20,1998, meeting l participants.
l The meeting began at 8:30 a.m. with a brief description of the purpose of the meeting, and an I introduction of those present. This was followed by a discussion by the staff of risk based l reviews and the need for the BWRVIP to provide a more complete systems and risk-informed l perspective in future submittals and responses. Specifically, the staff discussed the review of the Electric Power Research Institute (EPRI) proprietary report TR 105707, October 1995,
" Safety Assessment of BWR Reactor Intemals (BWRVIP-06)," dated October 5,1995, as supplemented by letters dated December 20,1996, and June 16,1997. In this instance, the staff, in its preliminary review, questioned whether the BWRVIP had adequately addrecsed (a)
- the potential for single failures to cascade into multiple failures and, (b) the deleterious effects of large loose parts on the ability to safely shutdown the reactor. The BWRVIP agreed to address the systems and risk-informed concerns in future submittals and responses. /
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- l. Next discussed was the staff's initial safety evaluation (SE), dated June 8,1998, on the EPRI Proprietary Report TR-105873, "BWR Vessel and intemals Project, Evaluation of Crack Growth p3 in BWR Stainless Steel Intemals (BWRVIP-14)," submitted initially on March 18,1996, and supplemented by letter dated July 28,1997. The BWRVIP is preparing a response to the open items in the SE, and recognizes that severallicensees are interested in using the three approaches described in the BWRVIP-14 report for the evaluation of crack growth. These approaches were found by the staff to be acceptable for use except where the staff's conclusions differ from the BWRVIP's, as discussed in the SE. Additionally, the representative from the Office of Nuclear Regulatory Research (RES) offered access to the BWRVIP, contingent upon agreements from both EPRI and the General Electric Company (GE), to the proprietary information collected and collated by the researchers at Argonne National Laboratory CONTACT: C. E. Carpenter, Jr., DE:EMCB EEibgdfidhl/ '
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E. J. Sullivan P (ANL). This will be further discussed at the September 17,1998, public meeting between the staff and its ANL contractor, and representatives of GE at the GE Corporate Research and Development Center in Schenectady, NY, to discuss the staff's review of the GE PLEDGE code, which also evaluates crack growth rate.
Briefly discussed next was the staff's review of the EPRI proprietary Report TR-107286, "BWR Vessel and Intemals Project, BWR Staridby Liquid Control System / Core Plate AP inspection and Flaw Evaluation Guidelines (BWRN IP-27)," submitted initially on April 25,1997, and supplemented by letter dated July 13,1998. The staff is still reviewing the BWRVIP's response to the staff's December 14,1997, request for additional information (RAl), and plans to have a draft SE in concurrence within the next several weeks.
The BWRVIP informed the staff that they are reviewing the staff's initial SE, dated June 8,1998, on the EPRI proprietary Report TR-105696, "BWR Vessel and Intemals Project, Reactor Pressure Vessel [RPV) and Intemals Examinations Guidelines (BWRVIP-03) " dated November
- 10,1995, as supplemented by letters dated April 16,1996, and March 12,1997. The open items in that SE was briefly discussed, and the BWRVIP is expediting its response to the staff.
The staff then discussed several items related to its ongoing review of the EPRI proprietary Reports TR-106708, "BWR Vessel and Intemals Project, Intemal Core Spray Piping and Sparger Replacement Design Criteria (BWRVIP-16)," dated March 18,1997, and TR 106893, "BWR Vessel and Intemals Project, Intemal Core Spray Piping and Sparger Repair Design Criteria (BWRVIP-19)," dated September 16,1996, as supplemented by letter dated February 24,1997. Specifically, the staff reiterated its concems related to geometry-critical and geometry-tolerant (see discussion on BWRVIP-18, below), especially as it relates to core spray sparger replacements and core spray flow distribution. Further, for core spray sparger replacements on non geometry critical plants, the staff stated that the licensee should evaluate the amount of leakage and its effect on localized cooling of the fuel and establish that leakage from core spray spargers is not a concem on a plant-specific basis. The BWRVIP stated that they will evaluate the staff's open items, when the initial SE for the BWRVIP-16 and -19 reports is issued, in light of the open issues in the staff's June 8,1998, SE on the BWRVIP-18 report.
L Next discussed was the staff's final SE, dated July 28,1998, on the EPRI proprietary Report
) - TR-105697, "BWR Vessel and Intemals Project, BWR Reactor Pressure Vessel [RPV) Shell L . Weld Inspection Recommendations (BWRVIP-05)," dated September 28,1995, as i supplemented by letters dated June 24 and October 29,1996, May 16, June 4, June 13, and l - December 18,1997, and January 13,1998. The BWRVIP informed the staff that they would be providing additional information related to the staff's RAI on the RPV axial shell welds, including a fluence model of the Clinton beltline shell welds, and supplementary information related to the chemistry of licensee beltline welds. The BWRVIP is determining how the staff's recommended analyses methods will affect individual BWR licensees. The staff asked the BWRVIP to determine how many, if any, BWR licensees will have difficulties with end of license fluences, based on these analyses. By letter dated June 8,1998, the staff requested that the BWRVIP
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provide a plan for followup analyses to determine, on a more realistic basis, the potential for axial weld failures due to cold over-pressure events and appropriate technical approaches for addressing this concem, as necessary< A further meeting to discuss the BWRVlP's plan will be scheduled.
O-E. J. Sullivan -
3-The BWRVIP also discussed their proposed integrated surveillance program (ISP) for addressing staff concems related to unirradiated surveillance materials. At present, the proposed generic program has been funded by the BWRVIP, but has not yet begun active work.
l The BWRVIP plans a formal submittal to the staff on this issue in the summer of 1999. The staff l requested that the BWRVIP expedite determining the status of materials available for testing
- l. unirradiated sur"Sillance specimens for individual licensees, and communicating with the staff l
any immediate or near-term deficiencies. The BWRVIP asked the staff what would be the procedure for licensees who desire to participate in the ISP, but are scheduled to remove surveillance capsules before the program is put in place. The staff agreed to expedite the reviews for these licensees who desire to delay for one cycle the removal of surveillance capsules while the BWRrlP's program is developed and the staff completes its review of the i
proposed ISP. The BWRVIP also stated that they intend to invite staff participation in future BWRVIP meetings on this topic.
The final topic of the moming portion of the meeting was questions from the BWRVIP related to the staff's initial SE, dated June 8,1998, of the EPRI proprietary Report TR-106740, "BWR
. Vessel and Intemals Project, BWR Core Spray Intemals inspection and Flaw Evaluation i Guidelines (BWRVIP-18)," dated July 26,1996, as supplemented by letter dated October 8, 1997. In the staff's initial SE, the staff did not agree that the proposed frequency for inspecting non-creviced welds in susceptible material is appropriate; the BWRVIP discussed appropriate t- weld inspection frequencies. Additionally, the BWRVIP-18 report categorizes BWRs as either
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. geometry tolerant" or " geometry-critical" with respect to the core spray spargers; the staff stated in its SE that all plants should be treated as " geometry-critical." The discussion was on what would need to be modified in the BWRVIP-18 report to allow " geometry-tolerant" inspection frequencies. The BWRt IP agreed to expedite their response back on the initial SE.
1 l The meeting broke for lunch between 12:15 p.m. and 1:00 p.m., then resumed with a discussion !
i by the staff of questions on the EPRI proprietary Report TR-108728,"BWR Jet Pump Assembly - !
Inspection and Flaw Evaluation Guidelines (BWRVIP 41)," dated October 15,1997. The staff's i I questions dealt with riser braces, jet pump hold-down beams and bolts, nozzle thermal sleeves,
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transition piece, Inlet (elbow and nozzle), mixer (throat), and restrainer brackets, and general ,
L topics. The BWRVIP addressed several, which will be covered in the initial SE, and will address the remaining when the staff issues an RAI on this report. 1 Charles Pierce, the BWR Owner's Group License Renewal Committee Chairman, joined the !
meeting for a short period to ask about the license renewal (LR) appendices to several of the BWRVIP reports. The staff informed Mr. Pierce and the BWRVlP representatives that the initial LR SE, related to the EPRI proprietary Report TR-108695, "BWR Vessel and Intemals Project, instrument Penetration Inspection and Flaw Evaluation Guidelines (BWRVIP 49)," dated March 13,1998, has been drafted and is in concurrence. Further LR SEs will be drafted and placed l.
_ into concurrence within approximately one month of the final SE for the respective BWRVIP report being completed; and, the final SE is expected to be forwarded to the License Renewal and Environmental Review Project Directorate for dispositioning within an additional month.
The staff had no comments as of this meeting on the remaining BWRVIP reports under review.
The BWRVIP confirmed that they are completing their response to the staff's RAI, dated April 8, l 1998, on the EPRI proprietary Report TR 108823, "BWR Vessel and Intemals Project, Shroud i
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- E. J. Sullivan -4 Support inspection and Flaw Evaluation Guidelines (BWRVIP-38)," dated September 15,1997, and that they expect to submit it within a month.
The BWRVIP staff and the NRC staff agreed to continue to meet to discuss emerging technical issues, status of technical reviews ard resource allocation. Further meetings Will be scheduled as needed.
Attachments: As stated cc: See next page '
Distribution:
l File Center Glainas/Jstrosnider WHKoo Lshao/MEMayfield JWiggins, R1 EMCB R/F GHolahan/sNewberry .JRRajan , EMHackett JJaudon, R2 PuBLIC , TECollins - KAKavanaugh MBMcNeil JGrobe, R3 ACRs CIGrimes ~ BJElliot TYChang AHowell, R4 BWsheron RHWessman KAManoly . RCaruso slec DOCUMENT NAME: G:\BWRVIPWIP-0820.MTS -
' INDICATE IN BOX:"C"= COPY Wlo ATTACHRIENTENC , E"= COPY W/ATTENCL, "N"mMO COPY EMCB:DE E EMCB:DE E EMCB:DE - E CECarpenter aA RAHerm[ KRWichman' h 08/26/1998 b 08/fl /1998 h I /1998
, OFFICIAL RECORD COPY
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E. J. Sullivan 4 Support inspection and Flaw Evaluation Guidelines (BWRVIP-38)," dated September 15,1997, and that they expect to submit it within a month.
The BWRVIP staff and the NRC staff agreed to continue to meet to discuss emerging technical issues, status of technical reviews and resource allocation. Further meetings will be scheduled
! as needed, t
l Attachments: As stated cc: See next page i
l
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