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| | number = ML15012A601 | | | number = ML15012A601 |
| | issue date = 01/12/2015 | | | issue date = 01/12/2015 |
| | title = LTR-14-0729 -Tom Gurdziel Email Pressurized-Water Reactor Loose Parts Monitor Alarm at SONGS - Region Iv Response | | | title = LTR-14-0729 -Tom Gurdziel Email Pressurized-Water Reactor Loose Parts Monitor Alarm at SONGS - Region IV Response |
| | author name = Dricks V L | | | author name = Dricks V L |
| | author affiliation = NRC/OPA/RGN-IV/FO | | | author affiliation = NRC/OPA/RGN-IV/FO |
Revision as of 03:29, 21 April 2019
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Category:E-Mail
MONTHYEARML22348A0322022-11-30030 November 2022 NRR E-mail Capture - Request to Resume Endangered Species Act Section 7 Consultation for Decommissioning of San Onofre Nuclear Generating Station, Units 2 and 3 ML22348A0532022-11-30030 November 2022 NRC to National Marine Fisheries Service (Nmfs), Request to Resume Endangered Species Act Consultation for Decommissioning of San Onofre Nuclear Generating Station, Units 2 and 3 ML22278A0182022-10-0404 October 2022 (SONGS) Unit 2 Reactor Head and Closure of Commitments Related to Peaceful Use of Foreign Technology- Acknowledge Receipt ML22265A2122022-09-22022 September 2022 Request for Additional Information for Exemption Request from 100m 72.106(B) Requirement, Docket Nos 50-206, 50-361, and 50-362 ML22119A2422022-04-29029 April 2022 Riv FOLLOW-UP Response: Question About April 11 San Onofre Event ML22034A9962022-02-0202 February 2022 S. Morris Response to C. Langley-Questions About Moving Snf at San Onfre ML21280A1022021-12-0606 December 2021 NRC to NMFS, Supplement to Request to Reinitiate Endangered Species Act Consultation for San Onofre Decommissioning ML21277A2342021-09-30030 September 2021 NMFS to NRC, Receipt of Request to Reinitiate Endangered Species Act Consultation for San Onofre Decommissioning ML21242A0602021-09-30030 September 2021 NRC to NMFS, Request to Initiate Consultation for SONGS Decommissioning ML21117A3492021-03-30030 March 2021 March 30, 2021, Email from Public Watchdogs on Providing New Information to Its October 13, 2020, 2.206 Petition ML21069A2482021-03-10010 March 2021 Umax, 07200054, 05000361, 05000362, FSAR Revision 4 for San Onofre ISFSI ML21068A2712021-03-0909 March 2021 Request for Additional Information Regarding Biological Opinion - SONGS- EPID L-2021-LLL-0006 ML20343A1292020-12-0808 December 2020 NRR E-mail Capture - Request for Additional Information ML20302A3252020-10-21021 October 2020 E-Mail: Acknowledgement of Receipt to the Petitioner Regarding SCE Use of Hi-Storm at SONGS ML20233A7342020-08-18018 August 2020 LTR-20-0313 David Victor, San Onofre Nuclear Generating Station (SONGS) Community Engagement Panel, Chair, Et Al., Letter Independent Spent Fuel Storage Installation Security at SONGS and Recent SONGS Community Engagement Panel Meeting on O ML20224A0172020-08-0707 August 2020 8-7-20 Corrected Hearing Time - Intervenor SCEs Acknowledgement of Oral Argument Notice (9th Cir.)(Case No. 20-70899) ML20224A0182020-08-0707 August 2020 8-7-20 Intervenor SCEs Acknowledgement of Oral Argument Notice (9th Cir.)(Case No. 20-70899) ML20204B0782020-07-22022 July 2020 Donna Gilmore Email Holtec Umax Materials (07200054, 05000361, 05000362) ML20198M4522020-07-15015 July 2020 Supplement to Public Watchdogs 2.206 Petition ML20163A3402020-05-0505 May 2020 Email Transmission - Peaceful Use Commitments State Dept for SONGS Rx Heads and Steam Generators ML20120A0282020-04-28028 April 2020 4-28-20 Notice of Addition of James Adler as Attorney for NRC (9th Cir.)(Case No. 20-70899) ML20076A5742020-03-11011 March 2020 Response to A.Mcnally San Onofre Canisters (LTR-20-0003) ML20062F5762020-02-28028 February 2020 Public Watchdogs 10 CFR 2.206 Petition - NRC E-mail to Petitioner Regarding Petition Screening Results February 28, 2020 ML20063M3092020-02-28028 February 2020 Public Watchdogs 10 CFR 2.206 Petition - Response from Petitioner to NRC E-mail Regarding Petition Screening Results, February 28, 2020 ML20059M2292020-02-25025 February 2020 OEDO-20-00053 2.206 Petition - Flooding Likely to Create Radioactive Geysers at SONGS ML20049A0802020-02-14014 February 2020 Public Watchdogs 10 CFR 2.206 Petition - E-mail to Petitioner on Immediate Actions Request Determination February 14, 2020 ML20007E5342020-01-0606 January 2020 Oceansiders Initial Assessment & Public Meeting Response E-Mail ML20006D7012019-12-23023 December 2019 Public Watchdogs 10 CFR 2.206 Petition SONGS - Petitioner Request for Public Meeting and NRC Response - December 23, 2019 ML19354B6762019-12-20020 December 2019 2.206 Petition Initial Assessment Notification E-Mail ML19325C5902019-11-20020 November 2019 2.206 Petition Status Notification Email ML19326B2392019-11-18018 November 2019 Public Watchdogs 10 CFR 2.206 Petition SONGS - Screened-in and PRB November 18, 2019 ML19319B6262019-11-0808 November 2019 Oceansiders 2.206 Petition Immediate Action Response E-Mail ML19326A7122019-10-30030 October 2019 Public Watchdogs 10 CFR 2.206 Petition - SONGS Receipt of Exhibits October 30, 2019 ML19326A9692019-10-25025 October 2019 Public Watchdogs 10 CFR 2.206 Petition - SONGS Immediate Action Determination October 25, 2019 ML19326A3602019-10-23023 October 2019 Public Watchdogs 10 CFR 2.206 Petition - SONGS First E-mail to Petitioner October 23, 2019 ML19284B3232019-10-0808 October 2019 Response LTR-19-0351 Kalene Walker, E-mail Concerns About Critical Safety Problems with Holtec Nuclear Waste Storage System at San Onofre ML19344C7842019-09-0303 September 2019 Response from NEIMA Local Community Advisory Board Questionnaire 09-03-2019 RSCS ML19344C7212019-08-30030 August 2019 Response from NEIMA Local Community Advisory Board Questionnaire 08-30-2019 J Steinmetz ML19217A1862019-08-0202 August 2019 E-Mail from M. Layton/Nrc to K. Walker/Public San Onofre - SONGS Special Inspection - Damaged Canisters ML19214A1362019-08-0202 August 2019 Riv Pao Response to Mr. Langley Response to Inquiry ML19221B4122019-07-30030 July 2019 Southern California Edison Company, Southern California Nuclear Generating Station, E-mail from Charles Langley to Scott Morris, NRC, Redundant Drop Protection Features at SONGS ML19213A1072019-07-29029 July 2019 Reply to Mr. Langley Re. Redundant Drop Protection Feature at SONGS ML19210D4292019-07-29029 July 2019 E-Mail from M. Layton/Nrc to D. Gilmore/Public Reply to E-Mail Questions ML19210D4342019-07-11011 July 2019 Curtiss-Wright SAS - 10 CFR Part 21 Reporting of Defects for Introl Positioner 890265-010 ML19190A0432019-06-28028 June 2019 Discusses Proprietary Information for Curtiss-Wright SAS - 10 CFR Part 21 Reporting of Defects for Introl Positioner 890265-010 - Cw SAS Initial Report No. 10CFR21-48 ML19165A1102019-06-11011 June 2019 SONGS Webinar (6-3-2019) Message - Sarah Akerson ML19190A0442019-06-0707 June 2019 10 CFR Part 21 Reporting of Defects for Introl Positioner 890265-010 - Cw SAS Initial Report No. 10CFR21-48 ML19158A4432019-06-0404 June 2019 Southern California Edison Company; Scratches on Nuclear Storage Canisters at San Onofre Pose No Problems, NRC Says After Its Own Analysis - Orange County Register ML19156A1422019-06-0404 June 2019 LTR-19-0218 Donna Gilmore, Sanonofresafety.Org, E-mail Scratches on Nuclear Storage Canisters at San Onofre ML19158A1312019-05-31031 May 2019 Paragon Energy Systems LLC -10 CFR Part 21 Report of Defect GS2 Terry Turbine Introl Positioners 2022-09-22
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Text
From:Dricks, Victor To:Tannenbaum, Anita
Subject:
FW: SONGS loose parts monitor Date:Monday, January 12, 2015 3:01:54 PMPlease enter my response to Tom Gurdziel into ADAMS
Victor DricksSenior Public Affairs OfficerU.S. Nuclear Regulatory Commission / Region IV1600 E. Lamar Blvd.
Arlington, Texas 76011(817) 200-1128 (Office)(817) 983-1992 (Cell) From: Dricks, Victor Sent: Monday, January 12, 2015 3:01 PM To: Tom Gurdziel (tgurdziel@twcny.rr.com)
Subject:
SONGS loose parts monitor
Dear Mr. Gurdziel:
Thank you for your e-mail of Dec. 28, 2014, to Chairman AllisonMacfarlane, regarding the loose part monitor at the San Onofre Nuclear GeneratingStation, on whose behalf I am responding.
The vibration and loose part monitoring system is designed for early detection of loose metallic parts in the primary system. Early detection can provide the time required to avoid or mitigate damage to, or malfunction of, primary system components. Due to the sensitivity of the monitors, spurious alarms occur on occasion. Operators are required to investigate the cause of these alarms to determine if there is an actual loose part in the steam generator.
The NRC resident inspectors were aware of the vibration and loose parts alarms during the operating cycle preceding the steam generator tube leak in January 2012, and identified this issue for follow-up to the AIT inspection. A follow-up inspection of the unresolvedissues identified by the AIT was conducted from August 20 to September 28, 2012. That
inspection determined that the licensee properly responded to and evaluated the loosepart monitor alarms according to vendor recommendations.
The licensee also requested from Westinghouse an in-depth evaluation of the acoustical
data. The results of that analysis were inconclusive because of limitations with themonitoring system. Specifically, because of sensor locations (lower portion of the steam generator below the tube sheet in the support structure) and sensitivity, it was not possible to determine the exact source of the Unit 3 alarms. Westinghouse engineering personnel performed an evaluation of acoustical data and determined from the shape and intensity of the particular responses that the acoustic source was not likely from the upper bundle of the replacement steam generator or related to the tube-to-tube wear.
Victor DricksSenior Public Affairs Officer U.S. Nuclear Regulatory Commission / Region IV1600 E. Lamar Blvd.Arlington, Texas 76011(817) 200-1128 (Office)(817) 983-1992 (Cell)
Good morning, Tom Gurdziel <
tgurdziel@twcny.rr.com
>Sunday, December 28, 2014 7:29 PMCHAIRMAN ResourceDricks, Victor; Screnci, Diane; Mitlyng, Viktoria; Michael Mulligan; Bridget Frymire PWR Loose Parts Monitor: A Repeating Nuisance Alarm?
As I was throwing away my no longer useful, handwritten comments on the SONGS replacement steam generators, Inoticed a problem that I do not believe has been addressed by the Nuclear Regulatory Commission.According to my notes, the SONGS AIT report, (ML12188A748), describes about 30 "valid" vibration and loose partsalarms at San Onofre. My recollection is that these alarms were described as valid although nocause had been identified for any alarm.
Does it make sense to keep in service, inaccurate PWR monitoring equipment?
Thank you,Tom Gurdziel
On page 22 of the referenced report, you will find that all the alarms apparently occurred betweenFebruary 18, 2011 and January 31, 2012. (This would not be even one complete year.)Is there any NRC group responsible for seeing that PWR nuisance alarms get addressed? Is there any recommended response time?