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Title: Screening reactor steam/water piping systems for water hammer

Abstract

A steam/water system possessing a certain combination of thermal, hydraulic and operational states, can, in certain geometries, lead to a steam bubble collapse induced water hammer. These states, operations, and geometries are identified. A procedure that can be used for identifying whether an unbuilt reactor system is prone to water hammer is proposed. For the most common water hammer, steam bubble collapse induced water hammer, six conditions must be met in order for one to occur. These are: (1) the pipe must be almost horizontal; (2) the subcooling must be greater than 20 C; (3) the L/D must be greater than 24; (4) the velocity must be low enough so that the pipe does not run full, i.e., the Froude number must be less than one; (5) there should be void nearby; (6) the pressure must be high enough so that significant damage occurs, that is the pressure should be above 10 atmospheres. Recommendations on how to avoid this kind of water hammer in both the design and the operation of the reactor system are made.

Authors:
 [1]
  1. Massachusetts Inst. of Tech., Cambridge, MA (United States)
Publication Date:
Research Org.:
Nuclear Regulatory Commission, Washington, DC (United States). Div. of Systems Technology; Massachusetts Inst. of Tech., Cambridge, MA (United States)
Sponsoring Org.:
Nuclear Regulatory Commission, Washington, DC (United States)
OSTI Identifier:
527558
Report Number(s):
NUREG/CR-6519
ON: TI97009145; TRN: 97:016692
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Sep 1997
Country of Publication:
United States
Language:
English
Subject:
21 NUCLEAR POWER REACTORS AND ASSOCIATED PLANTS; WATER HAMMER; PWR TYPE REACTORS; TWO-PHASE FLOW; PIPES; REACTOR OPERATION; DESIGN; MITIGATION; SUBCOOLING; REACTOR ACCIDENTS; BLOWDOWN; AUXILIARY WATER SYSTEMS; ENGINEERED SAFETY SYSTEMS

Citation Formats

Griffith, P. Screening reactor steam/water piping systems for water hammer. United States: N. p., 1997. Web. doi:10.2172/527558.
Griffith, P. Screening reactor steam/water piping systems for water hammer. United States. doi:10.2172/527558.
Griffith, P. Mon . "Screening reactor steam/water piping systems for water hammer". United States. doi:10.2172/527558. https://www.osti.gov/servlets/purl/527558.
@article{osti_527558,
title = {Screening reactor steam/water piping systems for water hammer},
author = {Griffith, P},
abstractNote = {A steam/water system possessing a certain combination of thermal, hydraulic and operational states, can, in certain geometries, lead to a steam bubble collapse induced water hammer. These states, operations, and geometries are identified. A procedure that can be used for identifying whether an unbuilt reactor system is prone to water hammer is proposed. For the most common water hammer, steam bubble collapse induced water hammer, six conditions must be met in order for one to occur. These are: (1) the pipe must be almost horizontal; (2) the subcooling must be greater than 20 C; (3) the L/D must be greater than 24; (4) the velocity must be low enough so that the pipe does not run full, i.e., the Froude number must be less than one; (5) there should be void nearby; (6) the pressure must be high enough so that significant damage occurs, that is the pressure should be above 10 atmospheres. Recommendations on how to avoid this kind of water hammer in both the design and the operation of the reactor system are made.},
doi = {10.2172/527558},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {9}
}