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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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At least 685 records · Page 38
All sourcesNASA NTRSDOE OSTI
DOE OSTI2022

Waste Control Specialists Technical Review Team Report

1. Modeling of Drum 68660 and the WCS Drums: A calibrated model of Los Alamos National Laboratory (LANL) Drum 68660 indicates that pressurization of the drum by restriction of drum venting could have led to the thermal runaway reaction at the Waste Isolation Pilot Plant (WIPP) in 2014, supporting the hypothesis that the contents of the drum were not fundamentally different from the overall remediated nitrate salt (RNS) waste stream. 2. Nitric Acid Reactions and Aging of the Waste: The stability of the WCS RNS waste with respect to autocatalytic thermal runaway due to nitric acid chemistry should increase over time as the nitric acid is depleted from chemical reactions in the drum. However, this cannot be confirmed because of the lack of long-term experimental data on the impact of aging on the reactivity of RNS waste. The calibrated model indicates that the waste drums retain most of their reactive components, metal nitrate salts and sWheat Scoop ® , even after eight years. 3. Pressure Effects and Runaway Reactions: The calibrated model indicates that if the drums and standard waste boxes (SWBs) are not allowed to pressurize during transport or storage and they are stored at historical WIPP repository temperatures, then an autocatalytic thermal runaway event is not expected to occur. Since the cause of Drum 68660 pressurization is not known, decision makers are not able to tailor mitigating strategies to the initiating event. Consequently, mitigating strategies must consider all feasible internal and external events that could lead to the pressurization of the drums. 4. Temperature Effects and Runaway Reactions: Temperature also has a strong influence on the stability of the waste. The calibrated model indicates that cooling the drums or SWBs can reduce the possibility of autocatalytic thermal runaway reactions. Simulations suggest that for a drum with a plugged vent, the probability of thermal runaway may be reduced or eliminated if wastes are maintained at or below 43 °F through active cooling measures from the initiation of transport until emplacement at WIPP.

12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE W↗
DOE OSTI2023

Test Site Verification Team: Optimal and Nominal Nuclear-Testing Programs [Slides]

Objectives of the Optimal and Nominal Nuclear-Testing Programs: Define optimal and nominal nuclear-testing programs; Discuss underground development for nuclear operations; Discuss underground nuclear operations, safety, and health; Compare drift complexes of optimal and nominal testing programs; Compare drift complexes for nuclear testing and commercial production; Discuss a potential future look of underground development and operations.

98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL P↗
DOE OSTI2023

Cavemen Animations for Nuclear Weapons Exhibit: Templates for VISIBLE Team

We use a couple of cavemen to explain the concept of deterrence, which has been with humans from the beginning. The interaction between the two cavemen will demonstrate how deterrence can discourage violence by instilling doubt and fear of the consequences escalating such violence further.

99 GENERAL AND MISCELLANEOUS↗
DOE OSTI2023

Multi-probe meeting with Harwell II: A discussion of potential areas of cooperation for mutual benefit by the LANL Multi-probe Radiography team [Slides]

In this presentation, we continue a discussion begun in September 2023, with staff from the University of Manchester and the Central Laser Facility-Harwell in the UK exploring the possibilities for cooperative work of mutual interest in the technology underpinning petawatt laser driven Multi-Probe radiography. Since the September Seminar, the US and UK staff have exchanged lists of ideas for possible cooperation and this presentation comprises brief descriptions of five topics that LANL staff would offer for consideration in the area of laser driven radiation sources, applications of machine learning and experiments at Omega (in the US) and Gemini (in the UK).

62 RADIOLOGY AND NUCLEAR MEDICINE↗