U.S. Nuclear Regulatory Commission

Attention to Liquid Dilution Volumes in Semiannual Radioactive Effluent Release Reports

HPPOS-099 PDR-9111210218

Title: Attention to Liquid Dilution Volumes in Semiannual

Radioactive Effluent Release Reports

See the memorandum from C. A. Willis to W. W. Meinke and C.

L. Miller dated November 7, 1984. The memo states that for

semiannual effluent reports pursuant to Regulatory Guide

1.21, licensees should use the total volume of dilution

flow, not just the flow during the time of liquified

effluent release. [Note: Effluent reports are now

required annually.] The dilutional volume (or flow) must

be determined specifically for each plant. In addition, a

table of expected dilution volumes may be prepared by the

contractor using data from various environmental

statements, ODCMs, etc.

Regulatory references: Regulatory Guide 1.21, Technical

Specifications

Subject codes: 2.2, 7.3

Applicability: Reactors