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Title: Assessments of fluid friction factors for use in leak rate calculations

Leak before Break procedures require estimates of leakage, and these in turn need fluid friction to be assessed. In this paper available data on flow rates through idealized and real crack geometries are reviewed in terms of a single friction factor k It is shown that for {lambda} < 1 flow rates can be bounded using correlations in terms of surface R{sub a} values. For {lambda} > 1 the database is less precise, but {lambda} {approx} 4 is an upper bound, hence in this region flow calculations can be assessed using 1 < {lambda} < 4.
Authors:
 [1]
  1. Berkeley Technology Centre, Glos (United Kingdom)
Publication Date:
OSTI Identifier:
489328
Report Number(s):
NUREG/CP--0155; CONF-9510432--
ON: TI97004806; TRN: 97:011468
Resource Type:
Conference
Resource Relation:
Conference: Seminar on leak before break in reactor piping and vessels, Lyon (France), 9-11 Oct 1995; Other Information: PBD: Apr 1997; Related Information: Is Part Of Proceedings of the seminar on leak before break in reactor piping and vessels; Faidy, C. [ed.] [Electricite de France, Villeurbanne (France)]; Gilles, P. [ed.] [Framatome, Paris (France)]; PB: 773 p.
Research Org:
Nuclear Regulatory Commission, Washington, DC (United States). Div. of Engineering Technology; Electricite de France (EDF), 69 - Villeurbanne (France); Battelle, Columbus, OH (United States)
Country of Publication:
United States
Language:
English
Subject:
22 NUCLEAR REACTOR TECHNOLOGY; 36 MATERIALS SCIENCE; PIPES; LEAKS; FLOW RATE; FRICTION FACTOR; LIMITING VALUES; TWO-PHASE FLOW