ML19290E242
| ML19290E242 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 02/25/1980 |
| From: | Lundvall A BALTIMORE GAS & ELECTRIC CO. |
| To: | Eisenhut P Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8003050537 | |
| Download: ML19290E242 (3) | |
Text
f BALTIMORE GAS AND ELECTRIC COMPANY P. O. B O X 1475 B A LTI M O R E. M ARYLAN D 21203 February 25, 1980 ARTHUR E. LUNOVALL JR.
v.cc FacsecrNT su-n, Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, D. C.
20555 Attn:
Mr. D. G. Eisenhrt, Acting Director Division of Opers ing Reactors
Subject:
Calv rt Cliffs Nuclear Power Plant Unitu Nos. 1 & 2, Dockets Nos. 50-317 & 50-318 HP/LP System Isolation Check Valves
Reference:
NRC letter (undated), received 2/23/80 from D. G. Eisenhut to All LWR Licensees, LWR Primary Coolant System Pressure Isolation Valves Gentlemen:
The referenced letter requested us to examine those high pressure piping systems which connect the Reactor Coolant System to low pressure piping systems to determine if an Event V isolation valve configuration, as described in the Reactor Safety Study (WASH-lh00), exists in the Class I portion of the piping. This configuration is defined as two check valves in series or two check valves in series with s motor-operated valve followed by low pressure piping outside containment. to this letter shows the typical configuration of the Lov Pressure Safety Injection (LPSI) piping and charging pump piping for both units of Calvert Cliffs Nuclear Power Plant. As can be seen, the LPSI design consists of three check valves in series with a normally closed motor-operated valve. All of the piping in this portion of the system has a design pressu.re rating of 2h85 psig.
It can likewise be seen that the charging system design consists of three check valves and four normally open isolation valves in series with the charging pump.
All piping fron the charging pump to r.he Reactor Coolant System has a design rating of 2h85 psig or greater, as indicated. There are no other high pressure piping systems which connect the Reactor Coolant System to a low pressure piping system outside containment using isolation check valves.
DDl S
8003050
/ /
i Mr. D. G. Eisenhut February 25, 1980 We have, therefore, determined that no Event V piping configurations exist in any of the applicable high pressure piping systems at Calvert Cliffs. This constitutes our response to this issue pursuant to 10 CFR 50 5h (f) and in accordance with the guidance contained in the referenced letter. If you have any questions concerning our response, please do not hesitate to contact us.
Baltimore Gas and Electric Company
,/
By - I,
[-
T n,,-[w / [ ' C A. E. Lundval,1, Jr.
[
Vice President Supply STATE OF MARYLAND:
TO WIT:
CITY OF BALTIMORE:
Mr. A. E. Lundvall, Jr. being duly svorn, states that he is Vice President of the Baltimore Gas and Electric Company, a corporation of the State of Marylar.d; that he executed the foregoing response for the purposes therein set forth; that the statements made in said response are true and correct to the best of his knowledge, information and belief; and that he was authorized to execute the response on behalf of said corporation.
!A WITNESS my hand and Notarial Seal.
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