skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: System Study: Auxiliary Feedwater 1998–2013

Abstract

This report presents an unreliability evaluation of the auxiliary feedwater (AFW) system at 69 U.S. commercial nuclear power plants. Demand, run hours, and failure data from fiscal year 1998 through 2013 for selected components were obtained from the Institute of Nuclear Power Operations (INPO) Consolidated Events Database (ICES). The unreliability results are trended for the most recent 10-year period, while yearly estimates for system unreliability are provided for the entire active period. No statistically significant increasing or decreasing trends were identified in the AFW results.

Authors:
 [1]
  1. Idaho National Lab. (INL), Idaho Falls, ID (United States). Risk Assessment and Management Services Dept.
Publication Date:
Research Org.:
Idaho National Lab. (INL), Idaho Falls, ID (United States)
Sponsoring Org.:
USDOE; US Nuclear Regulatory Commission (NRC)
OSTI Identifier:
1261720
Report Number(s):
INL/EXT-15-34439
TRN: US1601594
DOE Contract Number:
AC07-05ID14517; NRC-HQ-14-D-0018
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; FEEDWATER; NUCLEAR POWER PLANTS; DEMAND; EVALUATION; FAILURES; RELIABILITY; AUXILIARY WATER SYSTEMS; auxiliary feedwater; operating experience; pressurized water reactor; unreliability

Citation Formats

Schroeder, John Alton. System Study: Auxiliary Feedwater 1998–2013. United States: N. p., 2014. Web. doi:10.2172/1261720.
Schroeder, John Alton. System Study: Auxiliary Feedwater 1998–2013. United States. doi:10.2172/1261720.
Schroeder, John Alton. Wed . "System Study: Auxiliary Feedwater 1998–2013". United States. doi:10.2172/1261720. https://www.osti.gov/servlets/purl/1261720.
@article{osti_1261720,
title = {System Study: Auxiliary Feedwater 1998–2013},
author = {Schroeder, John Alton},
abstractNote = {This report presents an unreliability evaluation of the auxiliary feedwater (AFW) system at 69 U.S. commercial nuclear power plants. Demand, run hours, and failure data from fiscal year 1998 through 2013 for selected components were obtained from the Institute of Nuclear Power Operations (INPO) Consolidated Events Database (ICES). The unreliability results are trended for the most recent 10-year period, while yearly estimates for system unreliability are provided for the entire active period. No statistically significant increasing or decreasing trends were identified in the AFW results.},
doi = {10.2172/1261720},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Dec 31 00:00:00 EST 2014},
month = {Wed Dec 31 00:00:00 EST 2014}
}

Technical Report:

Save / Share:
  • This report presents an unreliability evaluation of the auxiliary feedwater (AFW) system at 69 U.S. commercial nuclear power plants. Demand, run hours, and failure data from fiscal year 1998 through 2014 for selected components were obtained from the Institute of Nuclear Power Operations (INPO) Consolidated Events Database (ICES). The unreliability results are trended for the most recent 10 year period, while yearly estimates for system unreliability are provided for the entire active period. No statistically significant increasing or decreasing trends were identified in the AFW results.
  • This report documents the results of a Phase I follow-on study of the Auxiliary Feedwater (AFW) System that has been conducted for the US Regulatory Commission`s Nuclear Plant Aging research Program. The Phase I study found a number of significant AFW System functions that are not being adequately tested by conventional test methods and some that are actually being degraded by conventional testing. Thus, it was decided that this follow-on study would focus on these testing omissions nd equipment degradation. The deficiencies in current monitoring and operating practice are categorized and evaluated. Areas of component degradation caused by current practicemore » are discussed. Recommendations are made for improved diagnostic methods and test procedures.« less
  • This report documents the results of a study of the Auxiliary Feedwater (AFW) System that has been conducted for the US Nuclear Regulatory Commission's Nuclear Plant Aging Research Program. The study reviews historical failure data available from the Nuclear Plant Reliability Data System, Licensee Event Report Sequence Coding and Search System, and Nuclear Power Experience data bases. The failure histories of AFW System components are considered from the perspectives of how the failures were detected and the significance of the failure. Results of a detailed review of operating and monitoring practices at a plant owned by a cooperating utility aremore » presented. General system configurations and pertinent data are provided for Westinghouse and Babcock and Wilcox units. 33 figs., 53 tabs.« less
  • This report presents an unreliability evaluation of the emergency power system (EPS) at 104 U.S. commercial nuclear power plants. Demand, run hours, and failure data from fiscal year 1998 through 2013 for selected components were obtained from the Institute of Nuclear Power Operations (INPO) Consolidated Events Database (ICES). The unreliability results are trended for the most recent 10-year period, while yearly estimates for system unreliability are provided for the entire active period. No statistically significant trends were identified in the EPS results.
  • This report presents an unreliability evaluation of the high-pressure coolant injection system (HPCI) at 25 U.S. commercial boiling water reactors. Demand, run hours, and failure data from fiscal year 1998 through 2013 for selected components were obtained from the Institute of Nuclear Power Operations (INPO) Consolidated Events Database (ICES). The unreliability results are trended for the most recent 10-year period, while yearly estimates for system unreliability are provided for the entire active period. No statistically significant increasing or decreasing trends were identified in the HPCI results.