Steam generator tube rupture risk impact on post-accident monitoring of French three-loop plants

Conference · Wed Jan 01 04:00:00 EST 1986 · Trans. Am. Nucl. Soc.; (United States)

OSTI ID:6496682

Zilliox, C

Experience with steam generator tube leak incidents in pressurized water reactor plants has resulted in an increase in Electricite de France's (EdF's) efforts at analysis and development of improvements in steam generator tube rupture accident treatment, taking into account single and multiple tube rupture with or without a steam break. This paper presents the analysis that leads to an evolution in post-accident monitoring for French three-loop 900-MW plants. The EdF approach can be summarized as follows: (1) a steam generator tube rupture consists of a second and third barrier simultaneously failing, resulting in radiological releases of reactor coolant system (RCS) fluid; (2) automatic and safety devices designed to cope with loss-of-coolant accidents (LOCAs) are able to maintain cladding and core integrity; (3) to recover third barrier integrity and to stop the leak, manual intervention is necessary; (4) if initial primary activity is low (according to stringent operating specifications) and remains low during the transient (according to emergency procedures relying on core safety priority), radiological consequences are low.

• Research Organization: Electricite de France, Villeurbanne
• OSTI ID: 6496682
• Report Number(s): CONF-860610-
• Conference Information: Journal Name: Trans. Am. Nucl. Soc.; (United States) Journal Volume: 52
• Country of Publication: United States
• Language: English

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21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
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220900* -- Nuclear Reactor Technology-- Reactor Safety
A CODES
ACCIDENTS
BOILERS
C CODES
COMPUTER CODES
EMERGENCY PLANS
ENERGY TRANSFER
EUROPE
FAILURES
FISSION PRODUCT RELEASE
FLUID FLOW
FRANCE
HEAT TRANSFER
MODIFICATIONS
PWR TYPE REACTORS
REACTOR ACCIDENTS
REACTORS
RISK ASSESSMENT
RUPTURES
SPECIFICATIONS
STEAM GENERATORS
TRANSIENTS
TUBES
TWO-PHASE FLOW
VAPOR GENERATORS
WATER COOLED REACTORS
WATER MODERATED REACTORS
WESTERN EUROPE