AREVA, Burial of Radioactive Waste, cancer, Chris Christie, clean water, corruption, dangers of nuclear, dry cask storage system, dry shielded canisters, DSC, environment, France, Germany, Holtec, interim fuel storage, Kris Pal Singh, Kris Singh, MPC, New Mexico, NRC, nuclear, nuclear accident, nuclear energy, nuclear industry, nuclear power, nuclear waste, NuHoms, peening, peening of welds, problem with peening welds, radioactive waste, risk management, spent fuel storage, spent fuel systems, TN, Transnuclear, underground interim storage, US, US NRC, USA, water, welds, WIPP
US NRC Meeting on Monday “To discuss Holtec International’s (Holtec) technical details and proposed plans to perform peening of dry shielded canisters (DSCs) welds for Holtec’s dry cask storage systems. 11/14/16 2:00PM – 4:00PM, Contact Jose Cuadrado 301-415-0606”
The discussion appears to be about peening already filled spent nuclear fuel canisters. In short, Holtec apparently wants to move Areva-Nuhoms canisters from their sideways storage to Holtec’s upright system at an “interim” storage place. Thus, this also seems to involve turning waste canisters designed to be on their side in Areva-Nuhoms casks to upright position in Holtec casks – a position which they weren’t designed for and which presumably would change stresses. Furthermore, the moved canisters must be within their 20 year design-license life, meaning that they could be, for instance, 19 years old. And, then what?
“Peening will induce a higher hardness into the weld and this is something that should be avoided. For this reason, peening is not normally accepted by the majority of codes, standards or specifications (ex. ASME B31.3 para 328.5.1 (d) location changes when new codes are published).” https://en.wikipedia.org/wiki/Peening
Furthermore: “Among the fabrication processes, welding has the greatest potential to affect the integrity of the waste package… although compressive stress is expected in the peened areas, the residual tensile stress may be greater than the original, nonpeened level at the transition zone just outside the peened area. The transition area between the peened and nonpeened regions at the surface of the welds needs to be carefully studied. Numerous failures were observed at these transition regions in laser-peened steam generator tubes (Wong and Payer, 2002)” [cited in Tszeng, 2008]
Additionally, there have been recent weld concerns for Areva-NuHoms spent fuel canisters (DSCs): “Xcel Energy loaded spent nuclear fuel into six 61BTH DSCs starting in September 2013. Subsequent to the loading, it was discovered that certain elements of the liquid penetrant test (PT) examinations, which were performed on the DSCs to verify the acceptability of the closure welds, do not comply with the requirements of TS 1.2.5. All six DSCs were affected. Five of the six DSCs (numbers 11-15) had already been loaded in the HSMs when the discrepancies were discovered. The DSC 16 remains on the reactor building refueling floor in a transfer cask (TC). Xcel Energy has performed phased array ultrasonic testing (PAUT) of the closure welds, supported by analysis, as an alternate means for verifying the weld quality.” https://s3.amazonaws.com/public-inspection.federalregister.gov/2016-14188.pdf Is sleazy, glib, Kris Singh of Holtec going to be the clean-up man for this problem since his system is to be underground in New Mexico where no one can see problems? Areva and its predecessors have had many problems with Quality, Quality Testing and Quality Assurance. Areva’s Transnuclear subsidiary, maker of NuHoms, used to be Franco-German Transnuclear which was caught up in a major European nuclear waste scandal. The New Mexico site is supposedly 35 miles away from towns – out of sight: http://www.nrc.gov/docs/ML1608/ML16089A451.pdf
According to a letter from Holtec in August “This license amendment request (LAR) 1040-3 seeks to include the 24PT1-DSC canister for storage in the HI-STORM UMAX System, in support of a future site-specific license request for a Consolidated Interim Facility.” August 30, 2016
This implies that it involves canister which have already been filled and which would be moved:
“Prior to storage in the HI-STORM UMAX System the following records verifications must be performed:
5.4.1 Verify through review of records that the DSC has been loaded in accordance with the applicable limits in CoC 72-1029, including but not limited to helium backfill requirements and heat load limits.
5.4.2 Verify through review of records that the loaded DSC is within its initial 20 year license life.
5.4.3 Verify through review of records that the DSC has not undergone transportation under Part 71.”
“DRY SHIELDED CANISTER (DSC) DSC is a welded pressure vessel that provides confinement of INTACT or DAMAGED FUEL ASSEMBLIES in an inert atmosphere” ATTACHMENT 3 TO HOLTEC, CERTIFICATE OF COMPLIANCE NO. 1040APPENDIX C TECHNICAL SPECIFICATIONS FOR THE STORAGE OF 24PT1-DSC IN HI-STORM UMAX CANISTER STORAGE SYSTEM ATTACHMENT 3 TO HOLTEC LETTER 5021033
Holtec Amendment allowing it to store DSCs, changes in red: http://www.nrc.gov/docs/ML1625/ML16250A396.pdf
Unlike the Holtec MPC canisters which are a mere 1/2 inch thick, the DSCs appear to be slightly thicker: http://www.nwtrb.gov/meetings/2016/aug/table1.pdf
US government photo of Holtec spent fuel casks shows how huge they are, and yet the sealed part only 1/2 inch thick for Holtec MPCs. The external cover is vented. The Areva-Nuhoms DSCs may be slightly thicker – probably one inch thick
Below is a conceptual drawing presented to the US NRC by apparent Holtec Competitor Waste Control Specialists (WCS) which seems to have the Areva-Nuhoms style of spent fuel casks on their sides and the Holtec design upright.
We don’t know the number of welds for the DSCs, but for the Holtec MPCs there are 3 Shop welds:
Shell longitudinal seam, Shell circumferential seam, Baseplate to shell,
And, 5 Field welds: MPC lid to shell, MPC closure ring to shell, Vent and drain port cover plate to MPC lid , MPC closure ring to closure ring radial, MPC closure ring to MPC lid (Description given to the US NRC by Holtec http://pbadupws.nrc.gov/docs/ML0813/ML081350158.pdf
“Among the fabrication processes, welding has the greatest potential to affect the integrity of the waste package. Welding thermally and mechanically loads the structure. In addition, many factors must be considered, and the process is complex and not always consistent. The principal welding effects are on the microstructure and mechanical properties. The former relates to phases, compounds, and composition, and the latter to voids, cracks, porosity, and stress.
In laser peening, a high-powered laser beam produces shock waves that generate compressive stresses in the surface material. Multiple-pass laser peening can increase the depth of the compressive-stress layer. It has been shown that compressive stress can be produced at depths of 2 to 3 mm [0.079 to 0.12 in] with multiple-pass laser peening (Bechtel SAIC Company, LLC, 2003b). Additional depth may be possible but has not been demonstrated. A shortcoming of this approach is that it only delays the potential initiation of stress corrosion cracking. Below the layer of compressive stress, the weld region may remain under tensile stress. When the compressive layer of material is lost from corrosion, the remaining material is still vulnerable to stress corrosion cracking. If the depth of compressive stress is insufficient, the performance life is reduced accordingly. Therefore, the depth of compressive stress is an important measure of the success of the laser peening.
A fully tested laser-peening process would rectify the possibility of inconsistent residual stress under the surface. Regardless, there are two concerns about the residual stress induced by laser peening: (i) relaxation of residual stress and (ii) state of stress outside the peened areas.
First, relaxation of residual stresses is frequently observed. The three primary mechanisms for residual stress relaxation are (i) tensile or compressive overload, (ii) cyclic loading, and (iii) thermal relaxation. The importance of each mechanism depends on the material and service conditions. Because no substantial tensile or compressive overload and cyclic loading are anticipated, only thermal relaxation is applicable to the waste packages.
According to Prevéy, et al. (1998), thermal relaxation progresses in two stages: a primary stage, which is extremely rapid, and a secondary stage, which appears to follow the Avrami diffusion model. Previous work by Prevéy, et al. (1998) and Prevéy and Cammett (2003) on several aerospace alloys, including TiB6Al-4V and IN 718, found that the thermal stability of compressive residual stresses induced by mechanical surface treatments was inversely proportional to the amount of cold work. As the cold work level decreased, the thermal stability of the compressive stress state increased. For TiB6AlB4V, laser-shock processing treatments inducing less than 5 percent cold work were found to offer good thermal stability, particularly when compared to surface treatments that induce extremely high levels of surface cold work (e.g., shot peening) (Shepard, et al., 2001).
Information on the stability of thermal stress for the Alloy 22 waste package outer container over a long period of time is not provided in Bechtel SAIC Company, LLC (2004). Although the peak temperature in the waste package is estimated to be only about 200 EC [392 EF], the relaxation of residual stress over tens or hundreds of years has not been documented. Furthermore, systematic studies of quasi-static relaxation of residual stress at higher temperatures of aerospace alloys are lacking. Without more concrete information or data, it may be prudent for DOE to evaluate the stability of residual stress induced by combined thermal and mechanical loading over the timeframe of interest.
Second, although compressive stress is expected in the peened areas, the residual tensile stress may be greater than the original, nonpeened level at the transition zone just outside the peened area. The transition area between the peened and nonpeened regions at the surface of the welds needs to be carefully studied. Numerous failures were observed at these transition regions in laser-peened steam generator tubes (Wong and Payer, 2002).”
Excerpted from: “REVIEW OF ANALYSIS OF MECHANISMS FOR EARLY WASTE PACKAGE AND DRIP SHIELD FAILURE” Prepared for U.S. Nuclear Regulatory Commission Contract NRCB02B07B006 Prepared by T. Calvin Tszeng (Consultant) Center for Nuclear Waste Regulatory Analyses San Antonio, Texas September 2008 http://www.nrc.gov/docs/ML0826/ML082630079.pdf
Much much more on Holtec and other Spent Fuel storage systems: https://sanonofresafety.org
Note that what is said in the Holtec “Confinement” document ML081350158 may no longer be totally true as Holtec has requested and gotten what seems like an endless string of exemptions for years: http://pbadupws.nrc.gov/docs/ML0813/ML081350158.pdf
The OIG initiated a first in TVA history; the debarment of a contractor doing business with TVA. In October 2010, TVA debarred Holtec International, Inc., based on the results of a criminal investigation conducted by the OIG…” http://oig.tva.gov/reports/node/semi/50/semi50.pdf https://miningawareness.wordpress.com/2015/02/05/why-was-holtec-debarred-as-tva-contractor/
From The Guardian, 11 July 2014: “Christie agency awarded $260m to politically connected New Jersey firm“: “Holtec International, which makes components for power plants, this week secured a $260m tax break from the New Jersey Economic Development Authority (NJEDA) – the third-biggest corporate subsidy that the state has awarded.“https://www.theguardian.com/world/2014/jul/11/christie-260m-subsidy-holtec-international-new-jersey
Published on Friday, November 04, 2016 by Common Dreams
“Two Top Allies of Trump Surrogate Chris Christie Found Guilty for Role in Bridgegate Bill Baroni and Bridget Anne Kelly found guilty of conspiracy and fraud by Andrea Germanos, staff writer A federal jury on Friday found two former top aides of New Jersey Gov. Chris Christie guilty on all counts for their role in the scandal known as Bridgegate.
“Camden’s Machine Boss George Norcross holds a position on Holtec’s governing board. Cost per new job: over $1 million. Follow the money: In 2014, Holtec’s president donated $10,400 to Mr. Norcross’ congressional campaign” http://www.alexlawforcongress.com/anti-corruption https://publicwatchdogs.org/4-arguments-emergency-court-injunction/
Christie could end up Attorney General or Secretary of Commerce under Trump. http://www.commondreams.org/news/2016/11/10/trump-transitions-power-cabinet-horrors-takes-shape One can but hope that Christie would break from Norcross-Holtec, but Christie as AG suggests no hope of a much needed investigation of Kris Singh and Holtec. As for the “Cabinet of Horrors” label coined by the French news agency AFP, France has no lessons to give considering its seemingly never-ending and excessive “state of emergency”.
“To discuss Holtec International’s (Holtec) technical details and proposed plans to perform peening of dry shielded canisters (DSCs) welds for Holtec’s dry cask storage systems.
Meeting Dates and Times
2:00PM – 4:00PM
NRC One White Flint North
11555 Rockville Pike
Office of Nuclear Material Safety and Safeguards
Docket Numbers – Facility Names
07201014 – HOLTEC INTERNATIONAL
07201032 – HOLTEC INTERNATIONAL
07201040 – HOLTEC INTERNATIONAL
ML16309A135 – 11/14/2016 Notice of Meeting with Holtec International (Holtec) to Discuss Holtec Technical Details and Proposed Plans to Perform Peening of Dry Shielded Canisters (DSCs) Welds for Holtec Dry Cask Storage Systems.
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001
November 4, 2016
PUBLIC MEETING NOTICE
Organization: Holtec International, Inc.
Date: November 14, 2016, 2:00 p.m. – 4:00 p.m.
Location: U.S. Nuclear Regulatory Commission (NRC) One White Flint North, Room O-4B6 11555 Rockville Pike, Rockville, MD 20852
Purpose: Discuss Holtec International’s technical details and proposed plans to perform peening of dry shielded canisters (DSCs) welds for Holtec’s dry cask storage systems.
Participants: NRC/NMSS/DSFM: Jose Cuadrado John McKirgan, et. al.
Holtec International, Inc. Stefan Anton, Kris Singh, Kimberly Manzione, et. al.
Meeting Category: This is a Category 1 Meeting. The public is invited to observe this meeting and will have one or more opportunities to communicate with the NRC after the business portion, but before the meeting is adjourned. The NRC’s Policy Statement, “Enhancing Public Participation on NRC Meetings,” effective May 28, 2002, applies to this meeting. The policy statement may be found on the NRC website, http://www.nrc.gov, and contains information regarding visitors and security.
The NRC provides reasonable accommodation to individuals with disabilities where appropriate. If you need reasonable accommodation to participate in this meeting, or need the meeting notice, transcript, or other information from the meeting in another format (e.g., braille, large print), please notify the NRC’s meeting contact. Determinations on requests for reasonable accommodation will be made on a case-by-case basis
Contact: Jose Cuadrado, (301) 415-0606, email@example.com
Attendance at this meeting by other than those listed above should be made known by November 10, 2016, by phone or email to the above contact.
Enclosure: Meeting Agenda
Docket Nos.: 72-1014, 72-1032, 72-1040”
THIS POST MAY BE SLIGHTLY ADDED TO OR EDITED (Or maybe not since time rarely allows). WE THOUGHT THAT THIS WAS ABOUT PEENING OF HOLTEC CANISTERS UNTIL THE LAST MINUTE AND THEN REALIZED THAT IT WAS OF AREVA-NUHOMS CANISTERS TO GO IN THE HOLTEC CASKS AND SO HAD NO TIME TO DO MORE THAN GLANCE QUICKLY THROUGH THE DOCUMENTATION. THERE IS A LOT MORE INFORMATION AT THE LINKS FOR THOSE WHO HAVE THE TIME AND INTEREST.