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Criticality, & Safety Issues at LANL's Plutonium Facility (PF-4)
updated 1 Mar 2022
Related news media & documents
- DOE Office of Enterprise Assessments: Triad National Security, LLC Nuclear Criticality Safety Program at LANL, May 2021
- LANL temporarily suspends workers who violated nuclear protocols, Santa Fe New Mexican, Sep 27, 2017
- NNSA says LANL workers faced no danger in latest incident, Los Alamos Monitor, Sep 27, 2017
- Plutonium pits at Los Alamos, Cultural Energy, KCEI 90.1 FM Taos, radio interview, Greg Mello, Sep 25, 2017
- LANL: No risk of radioactive ‘criticality’ accident in recent incident, Albuquerque Journal, Sep 25, 2017
- ‘Criticality safety event’ occurred at LANL’s plutonium facility, Albuquerque Journal North, Sep 22, 2017
- Report: LANL twice violated nuclear safety standards in Aug, Santa Fe New Mexican, Sep 22, 2017
- DNFSB board members Jesse Roberson & Daniel Santos memo stating objection to Memorandum of Agreement with DOE/NNSA, Aug 11, 2017
- Sen Claire McCaskill letter to NNSA re: Safety Violations, Aug 3, 2017
- LANL in Final Stages of PF-4 Restart Project , Nuclear Security Deterrence Monitor, Jun 24, 2016
- DOE Office of Enterprise Assessments, Review of the Los Alamos National Laboratory Plutonium Facility Restart of Fissile Material Operations, Jan 2016
- Independent Review of Seismic Performance Assessments for PF-4, LA-UR-15-29138, Nov 25, 2015
- DOE-IG-0941 Audit: Follow-up on Nuclear Safety: Safety Basis and Quality Assurance at the Los Alamos National Laboratory, Jul 2015
- NNSA Criticality Safety Program Weaknesses Resulting in an Operational Pause at the Plutonium Facility (PF-4), Apr 2014
- DOE says alternate analysis of PF-4 seismic risks will be done in Dec, Nuclear Weapons & Materials Monitor, Sep 6, 2013
- Selected Defense Nuclear Facilities Safety Board (DNFSB) Background Regarding Criticality Safety at Los Alamos National Laboratory (LANL), LASG, Oct 8, 2007
- Update of the Probabilistic Seismic Hazard Analysis (PSHA) and Development of Seismic Design Ground Motions at the Los Alamos National Laboratory, May 25, 2007
- Overview on Brookhaven National Laboratory (BNL) Assessment of Seismic Analysis Methods for Deeply Embedded NPP Structures, Apr 2007
- Numerous Infrastructure and Safety Deficiencies Impact Plutonium Pit Production at Los Alamos National Laboratory (LANL), Feb 20, 2007
- A Review of Criticality Accidents, 2000 Revision, LANL, LA-13638, May 2000, McLaughlin, et al. This document is the second revision of the original report LA-3611, released in 1967 and authored by William R. Stratton, LASL
- Seismic Safety of Federal and Federally Assisted or Regulated New Building Construction, Executive Order 12699, Jan 5, 1990
The following is a collection of key correspondence between the Defense Nuclear Facilities Safety Board (DNFSB), the Department of Energy (DOE), & the National Nuclear Security Administration (NNSA)
Seismic & Criticality Safety Issues
2021
2020
2019
2018
- DNFSB LANL WSR, PF-4 seismic safety, Dec 28, 2018
- DNFSB LANL WSR, Update to the Site-Wide Probabilistic Seismic Hazards Assessment & criticality safety, Sep 21, 2018
- DNFSB LANL WSR, PF-4 accident investigation, Sep 14, 2018
- DNFSB LANL WSR, PF-4 Safety Basis, Aug 17, 2018
- DNFSB Site Rep Jonathan Plaue presentation to the NM RHMC, Aug 15, 2018
- DNFSB Review of LANL Nuclear Criticality Safety Program, Aug 14, 2018
- DNFSB LANL WSR, PF-4 seismic safety, Aug 3, 2018
- DNFSB LANL WSR, PF-4 Safety Basis, Jul 20, 2018
- DNFSB LANL WSR, PF-4 Safety Basis, Jun 1, 2018
- DNFSB LANL WSR, PF-4 Safety Basis & criticality safety, May 18, 2018
- DNFSB LANL WSR, PF-4 safety, May 4, 2018
2017
2016
2015
- DNFSB ltr to NNSA re: PF-4 seismic performance, Sep 30, 2015
- DNFSB Technical Report - Opportunities for Risk Reduction at PF-4 through minimization of Material-at-Risk, Sep 21, 2015
- NNSA ltr to DNFSB re: PF-4 seismic performance, Aug 18, 2015
- NNSA ltr to DNFSB re: PF-4 seismic analysis, Feb 13, 2015
- DOE 2014 annual report to DNFSB re: Nuclear Criticality Safety Programs, Jan 31, 2015
2014
- DNFSB ltr to NNSA re: PF-4 seismic vulnerability, Dec 17, 2014
- DNFSB Report to Congress - Status of Significant Unresolved Issues in DOE's Design & Construction Projects, Sep 19, 2014
- DNFSB Site report re: PF-4 seismic safety, Jul 11, 2014
- DOE final report to DNFSB re: Rec 2004-2, active confinement systems, Jun 2014
- DNFSB ltr to NNSA re: PF-4 criticality safety, May 16, 2014
- NNSA Criticality Safety Program Weaknesses at PF-4, Apr 2014
2013
- DNFSB report on status of significant unresolved safety issues - design & construction of DOE's defense nuclear facilities, Dec 26, 2013
- DNFSB LANL WSR: PF-4 seismic & criticality safety, Dec 13, 2013
- NNSA ltr to DNFSB re: pause in programmatic operations due to criticality safety concerns in PF-4, Dec 6, 2013
- DNFSB Fourth Annual Report to Congress: Summary of Significant Safety-Related Infrastructure Issues, Oct 30, 2013
- DOE Dep. Sec. Poneman ltr to DNFSB, Sep 3, 2013
- NNSA ltr to DNFSB re: PF-4 criticality safety controls, Aug 15, 2013
- DNFSB response to DOE Sec. Moniz, re:Public and Worker Protection for a Seismic Collapse Scenario at PF-4, Jul 17, 2013
- DNFSB Staff Report re: LANL Criticality Safety Program, Jul 2, 2013
- DOE Sec. Chu ltr to DNFSB , Mar 27, 2013
- DOE NNSA ltr re: TA-55 Conduct of Operations & Criticality Programmatic Pause, Jan 26, 2013
- DNFSB ltr to DOE Sec. Chu re: PF-4 seismic accident scenarios, Jan 3, 2013
2012
- DNFSB Report to Congress, Status of Significant Unresolved Issues DOE's Design & Construction Projects, Dec 24, 2012
- DNFSB Third Annual Report to Congress: Summary of Significant Safety-Related Infrastructure Issues, Oct 31, 2012
- DOE Dep. Sec. Poneman ltr to DNFSB, Sep 28, 2012
- DNFSB ltr to DOE Dep. Sec. Poneman, Jul 18, 2012
- DNFSB ltr to NNSA Admin. D'Agostino re: Documented Safety Analysis, Jun 18, 2012
- DNFSB Staff Report, Documented Safety Analysis and Post-Seismic Accident Consequences, May 8, 2012
- NNSA Dep. Admin. for Def. Prog. Cook ltr to DNFSB, Jan 30, 2012
2011
- DNFSB Public Hearing & Meeting in Santa Fe, NM, Nov 17, 2011
– Transcript #1 Plutonium Facility Seismic Safety, and Emergency Preparedness and Response
– Transcript #2
- DNFSB Second Annual Report to Congress: Summary of Significant Safety-Related Infrastructure Issues, Sep 30, 2011
- NNSA deliverables in answer to DNFSB recommendation 2009-2, Jun 28, 2011
- NNSA deliverable 5.4.2 of Implementation Plan for DNFSB Recommendation 2009-2, LANL Plutonium Facilily Seismic Safety, Apr 1, 2011
- NNSA Implementation Plan (IP) deliverable 5.4.1 for DNFSB's Rec 2009-2, LANL Plutonium Facility Seismic Safety, Jan 31, 2011
- NNSA Implementation Plan (IP) deliverable 8.6.5 for DNFSB's Rec 2004-2, Ventilation systems in DOE complex, Jan 12, 2011
2010
- DNFSB report on "Summary of Significant Infrastructure Issues at Operating Defense Nuclear Facilities," Sep 10, 2010
- "Implementation Plan for DNFSB Recommendation 2009-2, "Los Alamos National Laboratory Plutonium Facility Seismic Safety," Jul 13, 2010
- NNSA's response to DNFSB ltr re: documented safety analyses, Jun 30, 2010
- Letter from DOE to DNFSB re: Rec 2009-2, "Los Alamos National Laboratory Plutonium Facility Seismic Safety," Feb 2, 2010
2009
2008
2007
2004
1999
1998
1996
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