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The 1994 loss of coolant incident at Pickering NGS

Abstract

Fracture of the rubber diaphragm in a liquid relief valve initiated events leading to a loss of coolant in Unit 2, on December 10. The valve failed open, filling the bleed condenser. The reactor shut itself down. When pressure recovered, two spring-loaded safety relief valves opened and one of them chattered. The shock and pulsations cracked the inlet pipe to the chattering valve, and the subsequent loss of coolant triggered the emergency core cooling system. The incident was terminated by operator action. No abnormal radioactivity was released. The four reactor units of Pickering A remained shut down until the corrective actions were completed in April/May 1995. (author). 4 figs.
Authors:
Charlebois, P R; Clarke, T R; Goodman, R M; McEwan, W F; [1]  Cuttler, J M [2] 
  1. Ontario Hydro, Pickering, ON (Canada). Pickering Generating Station
  2. Atomic Energy of Canada Ltd., Mississauga, ON (Canada)
Publication Date:
Dec 31, 1995
Product Type:
Conference
Report Number:
INIS-CA-0053; CONF-950623-
Reference Number:
SCA: 210400; PA: AIX-28:076169; EDB-97:143796; SN: 97001880575
Resource Relation:
Conference: 35. annual conference of the Canadian Nuclear Association and 16th annual conference of the Canadian Nuclear Society, Saskatoon (Canada), 4-7 Jun 1995; Other Information: PBD: 1995; Related Information: Is Part Of CNS proceedings of the 16. annual conference, volume I and II; Wight, A.L.; Loewer, R. [eds.]; PB: [2 v. ] p.
Subject:
21 NUCLEAR POWER REACTORS AND ASSOCIATED PLANTS; PICKERING-2 REACTOR; LOSS OF COOLANT; ECCS; HEAVY WATER; MECHANICAL VIBRATIONS; OUTAGES; PIPE WHIP; REPAIR; VALVES
OSTI ID:
545993
Research Organizations:
Canadian Nuclear Society, Toronto, ON (Canada)
Country of Origin:
Canada
Language:
English
Other Identifying Numbers:
Other: ON: DE98603788; TRN: CA9700786076169
Availability:
INIS; OSTI as DE98603788
Submitting Site:
INIS
Size:
pp. [9]
Announcement Date:

Citation Formats

Charlebois, P R, Clarke, T R, Goodman, R M, McEwan, W F, and Cuttler, J M. The 1994 loss of coolant incident at Pickering NGS. Canada: N. p., 1995. Web.
Charlebois, P R, Clarke, T R, Goodman, R M, McEwan, W F, & Cuttler, J M. The 1994 loss of coolant incident at Pickering NGS. Canada.
Charlebois, P R, Clarke, T R, Goodman, R M, McEwan, W F, and Cuttler, J M. 1995. "The 1994 loss of coolant incident at Pickering NGS." Canada.
@misc{etde_545993,
title = {The 1994 loss of coolant incident at Pickering NGS}
author = {Charlebois, P R, Clarke, T R, Goodman, R M, McEwan, W F, and Cuttler, J M}
abstractNote = {Fracture of the rubber diaphragm in a liquid relief valve initiated events leading to a loss of coolant in Unit 2, on December 10. The valve failed open, filling the bleed condenser. The reactor shut itself down. When pressure recovered, two spring-loaded safety relief valves opened and one of them chattered. The shock and pulsations cracked the inlet pipe to the chattering valve, and the subsequent loss of coolant triggered the emergency core cooling system. The incident was terminated by operator action. No abnormal radioactivity was released. The four reactor units of Pickering A remained shut down until the corrective actions were completed in April/May 1995. (author). 4 figs.}
place = {Canada}
year = {1995}
month = {Dec}
}