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Title: Physical Property Changes in Plutonium from Accelerated Aging using Pu-238 Enrichment

Abstract

We present changes in volume, immersion density, and tensile properties observed from accelerated aged plutonium alloys. Accelerated alloys (or spiked alloys) are plutonium alloys enriched with approximately 7.5 weight percent of the faster-decaying {sup 238}Pu to accelerate the aging process by approximately 17 times the rate of unaged weapons-grade plutonium. After sixty equivalent years of aging on spiked alloys, the dilatometry shows the samples at 35 C have swelled in volume by 0.15 to 0.17 % and now exhibit a near linear volume increase due to helium in-growth. The immersion density of spiked alloys shows a decrease in density, similar normalized volumetric changes (expansion) for spiked alloys. Tensile tests show increasing yield and engineering ultimate strength as spiked alloys are aged.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
902342
Report Number(s):
UCRL-PROC-226996
TRN: US200717%%264
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: Presented at: Materials Research Society, Boston, United States, Nov 27 - Dec 01, 2006
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; AGING; ALLOYS; DILATOMETRY; HELIUM; PLUTONIUM; PLUTONIUM ALLOYS; TENSILE PROPERTIES; ULTIMATE STRENGTH; NESDPS Office of Nuclear Energy Space and Defense Power Systems

Citation Formats

Chung, B W, Choi, B W, Saw, C K, Thompson, S R, Woods, C H, Hopkins, D J, and Ebbinghaus, B B. Physical Property Changes in Plutonium from Accelerated Aging using Pu-238 Enrichment. United States: N. p., 2006. Web.
Chung, B W, Choi, B W, Saw, C K, Thompson, S R, Woods, C H, Hopkins, D J, & Ebbinghaus, B B. Physical Property Changes in Plutonium from Accelerated Aging using Pu-238 Enrichment. United States.
Chung, B W, Choi, B W, Saw, C K, Thompson, S R, Woods, C H, Hopkins, D J, and Ebbinghaus, B B. Wed . "Physical Property Changes in Plutonium from Accelerated Aging using Pu-238 Enrichment". United States. doi:. https://www.osti.gov/servlets/purl/902342.
@article{osti_902342,
title = {Physical Property Changes in Plutonium from Accelerated Aging using Pu-238 Enrichment},
author = {Chung, B W and Choi, B W and Saw, C K and Thompson, S R and Woods, C H and Hopkins, D J and Ebbinghaus, B B},
abstractNote = {We present changes in volume, immersion density, and tensile properties observed from accelerated aged plutonium alloys. Accelerated alloys (or spiked alloys) are plutonium alloys enriched with approximately 7.5 weight percent of the faster-decaying {sup 238}Pu to accelerate the aging process by approximately 17 times the rate of unaged weapons-grade plutonium. After sixty equivalent years of aging on spiked alloys, the dilatometry shows the samples at 35 C have swelled in volume by 0.15 to 0.17 % and now exhibit a near linear volume increase due to helium in-growth. The immersion density of spiked alloys shows a decrease in density, similar normalized volumetric changes (expansion) for spiked alloys. Tensile tests show increasing yield and engineering ultimate strength as spiked alloys are aged.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Dec 20 00:00:00 EST 2006},
month = {Wed Dec 20 00:00:00 EST 2006}
}

Conference:
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