American National Standard Decay Heat Power in Light Water Reactors PDF Download
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Author:
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Category : Fission products
Languages : en
Pages : 50
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Book Description
Author: American Nuclear Society. Working Group ANS-5.1
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ISBN:
Category : Fission products
Languages : en
Pages : 56
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Book Description
Author:
Publisher:
ISBN:
Category : Fission products
Languages : en
Pages : 50
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Book Description
Author: American Nuclear Society. Standards Committee Working Group ANS-5.1
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ISBN:
Category : Nuclear facilities
Languages : en
Pages :
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Book Description
ANS 5.1-2014 (R2019) sets forth values for the decay heat power from fission products and actinides following shutdown of light water reactors (LWRs) using nuclear fuel initially containing 235U and 238U. The decay heat pwer from fission products is presented in tables and equivalent analytical representations. Contributions from the decay of 239U and 239Np and the contributions from all other actinides are represented separately. Methods are described that account for the reactor operating history, for the effect of neutron capture in fission products, and for assessing the uncertainty in the resultant decay heat power. The standard applies to decay times of up to 1010 after shutdown. This standard provides bases for determining the decay heat power and its uncertainty following shutdown of LWRs. The information in this standard can be used in the design, performance evaluation, and assessment of the safety of LWRs. The methods prescribed in this standard enable the calculation of fission product decay heat power with accuracies comparable to those of summation codes but without the need for complex calculations. The fission product decay heat power values in this standard have the advantage of being developed directly from experimental measurements for time periods
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Category :
Languages : en
Pages :
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Author: J. K. Dickens
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Category : Fission products
Languages : en
Pages : 15
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Author: American Nuclear Society. Standards Committee. Working Group ANS-5.1
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author:
Publisher:
ISBN:
Category : Fission products
Languages : en
Pages : 38
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Author:
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ISBN:
Category : Nuclear engineering
Languages : en
Pages : 44
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Category :
Languages : en
Pages :
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The ANSI/ANS-5.1 [1] standard on decay heat in light water reactors is one of the most widely used standards for reactor design and safety analysis. The standard was last revised and issued in 2005. The 2005 revision included several important accomplishments, including incorporation of ENDF/B-VI nuclear data in the development of correction factors implemented in the standard, and revisions to the 'simplified method.' The status of the 2005 ANS-5.1 standard has been summarized previously [2]. Future revisions of the standard under consideration, as proposed by the working group, were to (a) improve the neutron capture effect specification, (b) include contributions from actinides not already addressed by the standard, and (c) specify values for the total recoverable decay energy Q for major fissionable elements. These items are carried over from recommendations by Dickens et al. [3] during development of the 1994 revision. The current working group has also identified the representation of decay heat uncertainties as an area for improvement. This paper discusses recent development activities to further improve and extend the utility of the ANS-5.1 decay heat standard. These developments are in progress, and this paper summarizes the status of the activities. The proposed revisions discussed in this paper are being considered by the working group for adoption in the next publication of the standard.
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Category : Light water reactors
Languages : en
Pages : 28
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