ML20209D494

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Record of 860819 Telcon W/C Johnson Re Comments on NRC Draft Groundwater Travel Time Position (10CFR60)
ML20209D494
Person / Time
Issue date: 08/19/1986
From: Weber M
NRC
To:
References
REF-WM-1 NUDOCS 8609090332
Download: ML20209D494 (2)


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.A TIM E CONVERSATION RECORD 2:30 pm DAT%/19/86 Kg.

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NAME OF PERSON (S) CONTACTED OR IN CONTACT ORGANIZATION (Office, dept., bureau.

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Cady Johnson Mifflin and Associates (702) 798-040e w<

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Comments on NRC's Draf t Groundwater Travel Time Position (10 CFR ( 0) g g TQ q.'

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SUMMARY

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Mr. Johnson called me to inquire about equation 6 (on pg. 6) in NRC's Draf t f (jy b

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Generic Position on Groundwater Travel Time (6/30/86). He pointed out that the g

7..< ;p equation is dimensionally incorrect. He contended that since the retardation coefficient Q,j Y

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l Rd is dimensionless and the ratio n/n is also dimension 16ss, then Kd w uld have to

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e f'tp %

Q:M has dimensions of Volume / Mass.

be dimensionless, which would be incorrect since Kd

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I commented that he appeared to be correct, but I told him that he should talk with p* 7 (.{

.,e s Richard Codell, who derived equation 6.

I indicated that Dr. Codell would call him T'_'," E 4

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back when he returns from leave on 8/28/86.

Mr. Johnson was trying to resolve his

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comments on the position before submitting them formally to the State of Nevada, for

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whom is preparing the comments.

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D Mr. Johnson also stated that his other major comments included: (1) that the use of i!

average scepage velocities is inappropriate for media in which fracture flow is dominant p

k 1-and (2) that the discussion of dispersivity in the position overemphasizes molecular k

y diffusion compared with hydrodynamic (mechanical) dispersion.

I thanked Mr, Johnson for his comments.

ACTION REQUIRED Request Dr. Codell telephone Mr. Johnson to discuss the comments.

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NAME OF Pt RSON DOCUME NTING CONVE R$ATION SIGN AT U RE

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DATE

[6i 86/08/19 Michhel F. Weber

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