ML20128P194

Fowards Decay Heat Curve & Single Page Discussion of Curve. Some Info Sent to Findlayson at Snowmass,Co.W/O Encl

ML20128P194
Person / Time
Issue date:	11/30/1984
From:	Ryder C NRC OFFICE OF NUCLEAR REGULATORY RESEARCH (RES)
To:	Araj K HARVARD UNIV., CAMBRIDGE, MA
Shared Package
ML20127A894	List: IA-85-110, Forwards Technical Papers from Eg&G,Idaho for ANS Meeting in Snowbird,Ut.W/O Encls ML20127A890 ML20127B539 ML20127B616 ML20127C187 ML20128M621 ML20128M642 ML20128M650 ML20128M656 ML20128M664 ML20128M670 ML20128M675 ML20128M679 ML20128M684 ML20128M693 ML20128M700 ML20128M705 ML20128M712 ML20128M723 ML20128M727 ML20128M731 ML20128M739 ML20128M746 ML20128M753 ML20128M760 ML20128M767 ML20128M774 ML20128M781 ML20128M788 ML20128M795 ML20128M798 ML20128M819 ML20128M839 ML20128M853 ML20128M859 ML20128M865 ML20128M874 ML20128M878 ML20128M883 ML20128M890 ML20128M913 ML20128M918 ML20128M924 ML20128M946 ML20128M953 ML20128M973 ML20128M982 ML20128M990 ML20128N000 ML20128N011 ... further results
References
FOIA-85-110 NUDOCS 8507130217
Download: ML20128P194 (1)

Text

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Dr. Kamal Araj.

Physics Department Harvard University Cambridge, MA 02138

Dear Dr. Araj:

As you requested, enclosed is a decay heat curve and a single page discussion of it. This is the same information that was sent to Dr. Findlayson at Snowmass, Colorado.

Three copies are enclosed.

Sincerely, Christopher Ryder Accident Source Term Prograr Office, RES

Enclosures:

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Notes Abcut The Decay Heat Curve (1) How current are the curves?

(2) Is the decay heat from the actinides included in the curves?

(3) What are the equations describing the curves?

Since the ANS, no data has been published. The NRC and the EPRI sponsored the work to produce the curves and they were both satisfied with the results.

The curves are within a factor of 2 to experimental data. Therefore, these curves are up-to-date.

The decay heat from the actinides is not included in the curves. Equations have been recommended to calculate the decay heat for the actinices up to

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plutonium-239. At the time that the standard was set, 1979, the actinides above plutonium-239 were considered unimportant.

I do not have equations describing the curves. The equations appear in the foTTowing reference:

Decay Heat Power in Licht Water Reactors (1979)

ANSl/ANS - 5.1 - 1979 I

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