ML20003G225
| ML20003G225 | |
| Person / Time | |
|---|---|
| Site: | Haddam Neck File:Connecticut Yankee Atomic Power Co icon.png |
| Issue date: | 04/16/1981 |
| From: | Counsil W CONNECTICUT YANKEE ATOMIC POWER CO. |
| To: | |
| Shared Package | |
| ML20003G226 | List: |
| References | |
| A01379, A1379, NUDOCS 8104280490 | |
| Download: ML20003G225 (4) | |
Text
f e.
CONNECTICUT YANKEE ATOMIC POWER COMFANY B E R LIN. CO N N ECTIC U T P.O. BOX 270 H ARTFORD. CONNECTICUT C6 tot T at s peeon s 203-666-6911
.fS(l~j
~ ' '9 S (,N.5 \\
April 16, 1981 p
Docket No. 50-213 N
S.
E A01379 k_-
4 4
D
.g C
S
$/
Director of Nuclear Reactor Regulation
[~
'/
Attn:
Mr. Dennis M. Crutchfield, Chief 4
4 Operating Reactors Branch #5 U. S. Nuclear Regulatory Commission Washington, DC 20555
References:
(1)
W. G. Counsil letter to D. G. Eisenhut, dated December 31, 1980.
(2)
W. G. Counsil letter to D. M. Crutchfield, dated February 27, 1981.
(3)
W. G. Counsil letter to D. G. Eisenhut, dated December 15, 1980.
(h)
W. G. Counsil letter to D. M. Crutchfield, dated August 27, 1980.
(5)
D. G. Eisenhut letter to All Pressurized Water Reactor Licensees, dated July 2, 1980.
Gentlemen:
Haddas Neck Plant Proposed Revision to Technical Specifications Automatic Initiation of Auxiliary Feedvater In Reference (1), Connecticut Yankee Atomic Power Company (CYAPCO) advised the NRC Staff that proposed Technical Specifications for the safety-grade automatic auxiliary feedvater initiation system would be submitted by February 15, 1981.
Subsequent to the docketing of Reference (1), CYAPC0 determined that there were questions concerning the availability of the primary coolant loop isolation valves for the analysis of the steam generator tube rupture event.
Following further discussions with the NRC Staff, Reference (2) was docketed detailing CYAPCO's concerns and the conclusion that the case of no isolation of the affected steam generator by the loop stop valve had been addressed in previously docketed analyses and vas, therefore, not reportable. Reference (2) also informed the Staff that the proposed Technical Specifications for the safety-grade auxiliary feedwater system would be submitted by April 15, 1981.
Accordingly, CYAPCO hereby provides Attachment 1, in fulfillment of this commitment.
Single change bars identify changes proposed in Reference (4) for the control-grade scheme. Double bars reflect changes for the safety-grade scheme.
A complete review of the steam generator tube rupture event and detailed dose analyses vi ' be performed as part of SEP Topic XV-17, 810.4280490, g
_2-In References (1) and (3), CYAPC0 requested that implementation of the safety-grade scheme be delayed until the 1981 refueling outage. Should installation of the safety-grade system be required by July 1, most of the work required to install the safety-grade system would be installed during plant operation.
This is undesirable from the point cf view of having personnel working on or near energized circuits. These circuits may be de-energized during shutdown.
In addition, there is a greater probability of a spurious reactor trip or unexpected event while personnel are working on energized circuitry.
Because installation of the new transmitters cannot be performed during power operation in that access to the loop areas is necessary, implementation of the safety-grade scheme requires a plant outage.
Human engineering requirements req) ire that space on the main control board now used for the control-grade scheme should be utilized for the safety-grade scheme. Therefore, a lapse in the availability of an automatic scheme for initiating auxiliary feedwater can be avoided by waiting until the refueling outage to install the safety-grade scheme.
There is currently installed at the Haddam Neck Plant a control-grade scheme for automatic initiation of auxiliary feedwater. This scheme is currently defeated pending the Staff's safety etaluation. Should the control-grade scheme receive a favorable safety evaluation, it will be made operable.
Either this scheme or the operator's ability to manually initiate auxiliary feedvater assures its availability as required. Thus, CYAFC0 requests that this requirement be delayed until the next refueling outage, scheduled to begin in October, 1981. In thi event this position is not acceptable, CIAPCO requests prompt notification. The absence of a favorable safety evaluation from the Staff on the control-g. ade scheme to date supports the position that mid-cycle implementation of the safety-grade scheme is not appropriate.
Pursuant to 10CFR50.90, CYAPCO proposes to amend its operating license, DPR-61, by incorporating the revisions identified in Attachment 1 into the Haddam Neck Technical Specifications.
The proposal is consistent with the requirements of NUREG-0737, and reflects the system design which was fully described in Reference (1). Despite the fact that the installation of automatic initiation of auxiliary feedvater constitutes an unreviewed safety question as defined in 10CFR50.59, installation of the system is acceptable from a safety per-spective.
The Haddam Neck Plant Nuclear Review Board has reviewed and approved the attached proposed changes, and has concurred in the above determinations.
1 v..-v,
.-.---,,,,---,n..
-y 7 -
l
, i Via Reference (h), CYAPC0 forwarded paynent, pursuant to 10CFR170, for Technical Specification changes resulting fron a review of Reference (5).
The paynent included in Reference (k) was for a Class IV anendnent, and as such, applies to the attached proposed change. Accordingly, no additional paynent is enclosed.
Very truly yours, CONNECTICUT YANKEE ATOMIC POWER COMPNiY I'.
h$$
W. G. Counsil Senior Vice President
STATE OF CONNECTICUT )
)
ss.
Berlin hu/ /6, / fO
/
COUNTY OF HARTFORD
)
Then personally appeared before me W. G. Counsil, who being duly sworn, did state that he is Senior Vice President of Connecticut Yankee Atomic Power Company, a Licensee herein, that he is authorized to execute and file the foregoing information in the name and on behalf of the Licensees herein and that the statements contained in said information are true and correct to the best of his knowledge and belief.
}M. ha$2 Notary Public /
My Commissica Exgas Mad 31,19si l'
l
\\
l I
- ~ - - - - - -. - - ~ ~
s
.,,,.n,
-