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Title: PNL Technical Review of Pressurized Thermal Shock Issues Supplement 1: Technical Critique of the NRC Near-Term Screening Criteria

Abstract

Pacific Northwest Laboratory (PNL) provided a technical critique of the draft report, NRC Staff Evaluation of Pressurized Thermal Shock, dated September 13, 1982. This report provided the basis for the NRC near-term regulatory position on pressurized thermal shock {PTS) and recommended a generic screening criteria for welds in the vessel beltline region. The PNL staff concluded that the screening criteria were adequate to meet the intent of the NRC safety goal and to retain past predictions of vessel reliability. The conclusion was based on selecting the plant-specific nilductility transition reference temperature (RT{sub NDT}) in the conservative manner described within the staff report. Conservative and unconservative factors were mentioned throughout the NRC staff report. The PNL staff has listed these factors together with unknown (may be either conservative or unconservative) factors and estimated, where possible, the range in °F RT{sub NDT}. The unknown factors were so widespread that the PNL staff recommended that specific conservatisms not be reduced until the unknowns are further resolved.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
Office of Nuclear Reactor Regulation
OSTI Identifier:
1084050
Report Number(s):
PNL-4327 Supp 1; NUREG/CR-2837
DOE Contract Number:  
DE-AC06-76RL01830
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS

Citation Formats

Pederson, L. T., Apley, W. J., Bian, S. H., Pelto, P. J., Simonen, E. P., Simonen, F. A., and Stevens, D. L. PNL Technical Review of Pressurized Thermal Shock Issues Supplement 1: Technical Critique of the NRC Near-Term Screening Criteria. United States: N. p., 1983. Web. doi:10.2172/1084050.
Pederson, L. T., Apley, W. J., Bian, S. H., Pelto, P. J., Simonen, E. P., Simonen, F. A., & Stevens, D. L. PNL Technical Review of Pressurized Thermal Shock Issues Supplement 1: Technical Critique of the NRC Near-Term Screening Criteria. United States. doi:10.2172/1084050.
Pederson, L. T., Apley, W. J., Bian, S. H., Pelto, P. J., Simonen, E. P., Simonen, F. A., and Stevens, D. L. Sun . "PNL Technical Review of Pressurized Thermal Shock Issues Supplement 1: Technical Critique of the NRC Near-Term Screening Criteria". United States. doi:10.2172/1084050. https://www.osti.gov/servlets/purl/1084050.
@article{osti_1084050,
title = {PNL Technical Review of Pressurized Thermal Shock Issues Supplement 1: Technical Critique of the NRC Near-Term Screening Criteria},
author = {Pederson, L. T. and Apley, W. J. and Bian, S. H. and Pelto, P. J. and Simonen, E. P. and Simonen, F. A. and Stevens, D. L.},
abstractNote = {Pacific Northwest Laboratory (PNL) provided a technical critique of the draft report, NRC Staff Evaluation of Pressurized Thermal Shock, dated September 13, 1982. This report provided the basis for the NRC near-term regulatory position on pressurized thermal shock {PTS) and recommended a generic screening criteria for welds in the vessel beltline region. The PNL staff concluded that the screening criteria were adequate to meet the intent of the NRC safety goal and to retain past predictions of vessel reliability. The conclusion was based on selecting the plant-specific nilductility transition reference temperature (RT{sub NDT}) in the conservative manner described within the staff report. Conservative and unconservative factors were mentioned throughout the NRC staff report. The PNL staff has listed these factors together with unknown (may be either conservative or unconservative) factors and estimated, where possible, the range in °F RT{sub NDT}. The unknown factors were so widespread that the PNL staff recommended that specific conservatisms not be reduced until the unknowns are further resolved.},
doi = {10.2172/1084050},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1983},
month = {5}
}