ML20066C157
| ML20066C157 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 10/29/1982 |
| From: | Denton R BALTIMORE GAS & ELECTRIC CO. |
| To: | Jaffe D Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8211090365 | |
| Download: ML20066C157 (2) | |
Text
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W B ALTIMORE G AS AND ELECTRIC COMPANY P.O. D O X 14 7 5 B A LTI M O R E. M A R Y L A N D 212o3 HUCLEAR POWER DEPARTMENT October 29,1982 CALVERT CLIFFS NUCLEAR POWER PL ANT LUSBY, M ARYLAND 2C657 U.S. Nuclear Regulatory Commission Division of Licensing Room 430 Phillips Building Washington, DC 20555 ATTENTION:
Mr. David H. Jaffe, Project Manager Operating Reactors Branch #3
SUBJECT:
Calvert Cliffs Nuclear Power Plant Unit Nos.1 & 2; Docket Nos. 50-317 & 50-318 Inservice Inspection Program
REFERENCES:
(1)
BG&E Letter from A. E. Lundvall, Jr., to R. A. Clark, dated November 6,1981, Inservice Inspection Program Request for Relief from ASME Code Section XI (2)
BG&E Letter from A. E. Lundvall, Jr., to R. W. Reid, dated March 29,1980, Inservice Inspection Program Request for Relief i
from ASME Code Section XI Gentlemen:
The letters referenced requested relief from ASME Code Section XI requirements as provided by the provisions of 10 CFR 50.55a(gX5). Included in these requests were exemptions from performing system hydrostatic pressure tests on Class III portions of Component Cooling, Service Water, and Saltwater Cooling Systems at Calvert Cliffs Unit l
Nos. I and 2. On the main headers of these systems, where butterfly valves are installed, sufficient seal to maintain hydrostatic pressure on isolated portions cannot be achieved.
l In lieu of performing hydrostatic pressure tests once every ten (10) years, it was proposed to perform system pressure tests at an increased (annual) frequency.
Presently, Calvert Cliffs is following ASME Code Section XI,1974 Edition, with Addenda l
through Summer 1975.
This requires that Class III hydrostatic pressure tests be performed at 1.10 times the system design pressure.
During your review of the referenced exemption requests, it was pointed out that later approved addenda of ASME Code Section XI may reduce hydrostatic pressure requirments to an achievable pressure for these Class III systems. ASME Code Section XI,1977 Edition, with Addenda through Summer 1978, requires that Class III hydrostatic pressure tests be performed at 1.10 times the lowest relief valve setting for the system. For Component Cooling, Service Water, and Saltwater Cooling Systems the lowest relief valve settings are equal to or very close to the system design pressure. Therefore, optionally updating to the later approved addenda of ASME Code Section XI will not alter the impracticality of performing hydrostatic pressure tests on these systems. The following is a list of these pressures.
l i8211090365 ' 821029
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a Mr. David H. Jaffe October 29,1982 Page 2 SERVICE COMPONENT SALT WATER COOLING WATER Design Pressure (psig) 150 150 60 Lowest Relief Setting (psig) 150 110 50 Normal Operating Pressure (psig) 100-120 60-80 20-35 74-S75 Hydro Pressure (psig) 165 165 66 77-578 Hydro Pressure (psig) 165 121 55 It is requested that you continue with the approval process of these relief requests as originally stated in the referenced letters. Should you have further questions on this matter, please do not hesitate to contact us.
Very truly yours, f
h s
( G A*
R E. Denton General Supervisor -
Training & Technical Services RED /gla cc: Messrs.
L. B. Russell R. P. Heibel R. E. Architzel D. W. Latham B. C. Rudell 1
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