ML20216B386

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Forwards Amend Application 177 & 163 to Licenses NPF-10 & NFF-15,respectively.Applications Consist of Proposed Change Number NPF-10/15-492 (PCN 492),which Requests Changes to TS Section 1.1, Definitions
ML20216B386
Person / Time
Site: San Onofre  Southern California Edison icon.png
Issue date: 05/07/1998
From: Nunn D
SOUTHERN CALIFORNIA EDISON CO.
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20216B392 List:
References
NUDOCS 9805180059
Download: ML20216B386 (2)


Text

It e $ SOUIHIRN CALIFORNIA b EDISON o-is'*' """"

Vice President An EDISON INTERNATIONAL" Company l .

May 7, 1998 l

l U. S. Nuclear Regulatory Commission  !

Attention
Document Control Desk Washington, D.C. 20555 Gentlemen: i l

Subject:

Docket Nos. 50-361 and 50-362 Amendment Application Nos. 177 and 163 DEFINITION OF DOSE EQUIVALENT I-131 San Onofre Nuclear Generating Station Units 2 and 3 Enclosed are Amendment Application Numbers 177 and 163 to Facility Operating Licenses NPF-10 and NPF-15 for San Onofre Nuclear Generating Station (SONGS)

Units 2 and 3, respectively. These amendment applications consist of Proposed ChangeNumberNPF-10/15-492(PCN492),whichrequestschangestoTechnical Specification (TS) Section 1.1, " Definitions."

The proposed amendment to TS 1.1 is to change the reference for obtaining the thyroid dose conversion factors (DCFs) used in the definition of Dose Equivalent Iodine 131 (I-131). Specifically, the reference to " Table E-7 of ,

Regulatory Guide 1.109, Rev.1, NRC,1977," is to be replaced with a reference  !

to the International Commission on Radiological Protection Publication 30 (ICRP-30), Supplement to Part 1, pages 192-212, Tables titled, " Committed Dose Equivalent in Target Organs or Tissues per Intake of Unit Activity."

l Utilization of the more recent ICRP-30 DCFs will provide a more realistic assessment of predicted thyroid dose consequences associated with releases of radioactivity as compared to Revision 1 of Regulatory Guide 1.109.

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PDR P

ADOCK 05000361 PDR.

'{t P. O.Ib $N San Clemente, CA 92674-0128 949-168-l 480 Fat 949 368-1490

l s-Document Control Desk f If you would like additional information on this Technical Specification -

change request, please let me know.

Sincerely, f 1

~

.t W l

Dwight . Nunn 1 t

Enclosure cc: E. W. Merschoff, Regional Administrator, NRC Region IV K. E. Perkins, Jr., Director, Walnut Creek Field Office, NRC Region IV J. A. Sloan, NRC Senior Resident Inspector, San Onofre Units 2 & 3 J. W. Clifford, NRC Project Manager, San Onofre Units 2 and 3 l S. Y. Hsu, Department of Health Services. Radiologic Health Branch l

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