ML20235W990
| ML20235W990 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 07/15/1987 |
| From: | Carey J DUQUESNE LIGHT CO. |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| Shared Package | |
| ML20235W992 | List: |
| References | |
| NUDOCS 8707240002 | |
| Download: ML20235W990 (4) | |
Text
- - - _. _ - - _ _ - - _ - _ _ _ _ _ _ _ _ -_ _.
a I
. hL
\\
I h5 Telephone (412) 393-6000 fu*aojoup July 15, 1987 o9 Shippingport, PA 15077-0004 U. S. Nuclear Regulatory Commission Attn:
Document' Control Desk Washington, DC 20555
Reference:
Beaver Valley Power Station, Unit No. 1 Docket No. 50-334, License No. DPR-66 s
Updated Final Safety Analysis Report, Revision 5, January 1987
' Gentlemen:
A. signed ' original and ten (10) copies of Revision 5 replacement pages for the Beaver Valley Power Station, Unit No. 1 Updated Final Safety Analysis Report (FSAR) have been forwarded in accordance with 10 CFR 50.71(e).
'To our best judgement and
- ability, this revision accurately presents changes necessary to reflect information and analysis submitted to the Commission or prepared pursuant to Commission requirement.
This includes changes identified in the 1986 " Report of Facility Changes, Tests and Experiments" which is submitted under the provisions of 10 CFR 50.59.
Editorial changes intended to correct or clarify the text of the Updated FSAR are also included in this revision.
The Final Safety Analysis Report Quality Assurance Program description (FSAR, Appendix A) has been revised to reflect changes in Duquesne Light Company's management structure and to reflect current Quality Assurance Unit practices.
These changes have been reviewed against the requirements of 10 CFR 50.54(a)(3) and it has been determined that the changes do not reduce the commitments in the QA program description previously accepted by the NRC.
The Unit No.
1 hydrogen recombiners were modified during the fifth refueling outage to upgrade the electrical components to more current standards.
Part of the modification included replacing the positive displacement blowers-in the recombiners with centrifugal type blowers.
When testing the recombiners, it was determined that the required Technical Specification flow through the recombiners could not be obtained with the containment at normal operating vacuum.
The resultant investigation determined that the weight loaded 2-inch swing check valves installed inside containment on both the recombiner suction and discharge lines offered too high a
. resistance to flow for the new blower.
Subsequent testing conducted with these check valves held open resulted in acceptable test results demonstrating the operability of the hydrogen recombiners.
In order to achieve this piping and valve configuration to support recombiner operation, a plant modification was required.
The inside containment' 3
8707240002 B70715
{DR ADOOK0500g4
Beaver Valley Power Station, Unit No. 1 Docket No. 50-334, License No. DPR-66 Updated Final Safety Analysis Report, Revision 5, January 1987 Page 2 check valves on the recombiner suction lines do not function as containment isolation valves but rather function to prevent air in-leakage to containment in the event of failure of the containment vacuum pumps which maintain the containment subatmospheric.
The internals of these suction valves were removed and new check valves were installed downstream of the 2
outside containment isolation valves and upstream of the containment vacuum pumps to prevent air in-leakage to containment.
New ball valves were installed on the recontener discharge piping to serve as new containment isolation valves.
These valves were installed as close to the existing outside containment isolation valves as possible and still permit leak testability.
The internals were removed from the inside containment isolation valves (weighted swing check valves) after acceptance testing of the new isolation valves.
FSAR pages have been revised to reflect these recombiner piping modifications, and have been included in the attached FSAR update pack &ge.
A Technical Specification change has also been submitted (refer to our letter of August 22, 1986) to revise Table 3.6-1,
" Containment Penetrations".
The proposed snendment would revise the containment isolation valves listed for penetrations 87 and 88 -
hydrogen recombiner discharge to containment.
Since the Updated FSAR is a
controlled document subject to periodic revision and is intended to be used in recurring safety
- analyses, it is requested that you acknowledge receipt of the enclosed replacement pages.
For your convenience in doing this, a Receipt Verification Form has been provided for you to complete and return.
Your cooperation in this regard would be most appreciated.
Very t ly yours,
. Carey Senior Vice President, Nuclear Group Attachments w____________
Banvar Vcllcy Powsr Station, Unit No. 1 l
Docket No. 50-334, License No. DPR-66 Updated Final Safety Analysis Report, Revision 5, January 1987 Page 3 l
cc:
Mr. F. I. Young, Sr. Resident Inspector U. S. Nuclear Regulatory Commission i
l Beaver Valley Power Station Shippingport, PA 15077 U.
S. Nuclear Regulatory Commission I
Regional Administrator Region 1 631 Park Avenue King of P7:ussia, PA 19406 Mr. Peter S. Tam (without attachments)
U. S. Nuclear Regulatory Commission Project Directorate No. 2 Division of PWR Licensing - A Washington, DC 20555
- Mail Stop 316 -
i Addressee only I
i w ____________-_ __
UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION In the Matter of
)
)
Docket No. 50-334 Duquesne Light Company
)
(Beaver Valley Power Station, Unit No. 1)
)
SUBMITTAL OF THE ANNUAL REVISION TO THE UPDATED FSAR Pursuant to Section 50.71(e) of the regulations of the U. S.
Nuclear ~ Regulatory Commission (the
" Commission"),
Duquesne Light
- Company, holder of. Operating License No. DPR-66, hereby submits the current annual revision to the Updated Final Safety Analysis Report (FSAR), -Revision 5, January 1987 for Beaver Valley Power Station Unit No. 1.
To my best personal knowledge and
- belief, and with the exceptions noted in the cover letter, this revision to the Updated.
FSAR as submitted accurately presents changes necessary to reflect information and analyses submitted to the Commission or prepared pursuant to Commission Requirement.
1 i
1 Duquesne Light Company By
- 3. V. Cybey V '
Senior Vice President, Nuclear Group
{
Subscribed and sworn to efore me on this /
Cday of
</
//d $
$fG46
/
SittaA s. ranox.ewet rusuc WilPPIEGPORT 80% WWEtt Cculiff Of COEllllSB10lP DIPtvt OCT. 23.193 pree, ramveam.w. at menuse
.