ML20112J778
| ML20112J778 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 06/18/1996 |
| From: | Cruse C BALTIMORE GAS & ELECTRIC CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| TAC-M86396, TAC-M86397, TAC-M86437, TAC-M86438, NUDOCS 9606210052 | |
| Download: ML20112J778 (2) | |
Text
...
/
CH Antxs II. CHOSE Italtirnore Gas and Electric Company Vice President Calvert Cliffs Nuclear Power Plant Nuclear Energy 1650 Calvert Cliffs Parkway Lusby, Maryland 20657 410 495-4455 June 18,1996 U. S. Nuclear Regulatory Commission Washington, DC 20555 ATTENTION:
Document Control Desk l
l
SUBJECT:
Calvert Cliffs Nuclear Power Plant Unit Nos.1 & 2; Docket Nos. 50-317 & 50-318 Extension of Control Room liabitability Analysis Submittal Date (TAC Nos. M86396. M86397. M86437. and M86438)
REFERENCES:
(a)
Letter from Mr. R. E. Denton (BGE) to NRC Document Control Desk,
(
dated June 7,1995, Control Room liabitability - Thyroid Dose Analysis (TAC Nos. M86396; M86397)
(b)
Letter from Mr. D. G. Mcdonald, Jr. (NRC) to Mr. R. E. Denton (BGE),
dated June 22, 1995, Control Room IIabitability Interim Analysis for Thyroid Dose, Calvert Cliffs Nuclear Power Plant, Unit Nos. I and 2 (TAC Nos. M86396, M86397, M86437, and M86438) l (c)
Letter from Mr. R. E. Denton (BGE) to NRC Document Control Desk, l
dated May 6,1993, Control Room liabitability - Interim Engineering Analysis for Thyroid Dose l
In Reference (a), we notined you of our expectations to submit our Control Room thyroid dose analysis by July 31,1996. As discussed in that letter, this time frame was chosen to allow coordination of the Individual Plant Examination of External Events (IPEEE) submittal, so that the IPEEE results could be considered in the Gnal system design configuration, thereby ensuring that the most effective system con 0guration would result. Our proposed submittal date was acknowledged in Reference (b), in which you approved our interim engineering analysis for thyroid dose, submitted in Reference (c).
1 in the past year, we have made significant progress towards completing a thyroid analysis incorporating plant modi 6 cations and revised calculational methodology and assumptions based on more current industrv knowledge. One of the more significant assumptions currently being pursued in our Control 9606210052 960610 1
o PDR ADOCK 05000317
.OV P
PDR C0 L
Document Control Desk
. Juife 18,1996
' ' Page 2 Room thyroid dose analysis is the application of the timing aspects of the revised accident source term of NUREG-1465. Although Baltimore' Gas and Electric Company is not officially participating in the industry initiative to implement the revised accident source term, we have been following the developments of this initiative, and are basing our calculation on the generic methodology being developed through the initiative.
To ensure a consistent application of the revised source term, the NRC Staff has requested that no such submittals be made by non participating plants until after the pilot plant submittals have been approved.
As the NRC has not yet approved either the generic framework document for applying the revised radiological source terms, nor any of the submittals by the pilot plants participating in this initiative, we -
propose extending our commitment to submit the thyroid dose analysis until July 31, 1997. This extension should allow sufficient time to finalize and review the analysis utilizing the revised source term, and to ensure any plant changes credited in that analysis are consistent with the IPEEE findings. In the meantime, the interim engineermg analysis for thyroid dose, submitted in Reference (c), and -
approved 'in Reference (b), will continue to provide assurance that our Control Room operators are adequately protected against significant iodine uptake following a loss-of-coolant accident.
Should you have questions regarding this matter, we will be pleased to discuss them with you.
Very truly yours,
}h t
%/n i
CilC/ Nil / dim i
cc:
D. A. Brune, Esquire T. T. Martin, NRC J. E. Silberg, Esquire Resident Inspector, NRC -
Director, Project Directorate I-1, NRC R.1. McLean, DNR A. W. Dromerick, NRC J. II. Walter, PSC -
---