ML19331C939
| ML19331C939 | |
| Person / Time | |
|---|---|
| Site: | Zion File:ZionSolutions icon.png |
| Issue date: | 08/15/1980 |
| From: | Naughton W COMMONWEALTH EDISON CO. |
| To: | |
| Shared Package | |
| ML19331C940 | List: |
| References | |
| NUDOCS 8008200314 | |
| Download: ML19331C939 (3) | |
Text
Commonwealth Edison one First Natronal P'aza. Chicago libnors Address Reply to:
Chicago. Ilhnois 60690 Post Otfice Box 767 August 15, 1980 Mr. Harold R. Denton, Director U.S. Nuclear Regulatory CommissionOf fice of Nuclear React Washington, DC 20555
Subject:
Zion Station Units 1 and 2 License Nos. OPR-39 and DPR-48 Proposed Ch NRC Occket Nos. 50-295 and 50-304
Dear Mr. Denton:
Pursuant to 10 CFR 50.90, hereby requests an immediate temporCommonwealth Edison Company License Nos. DPR-39 and The purpose of this amendmentary change allow cor.tinued operation of the Zio OPRT48.
performed on circulating water pumpsn units while maintenance is is to months.
by Commonwealth Edison are contained in AttThe changes eci fications pro,ncsed this temporary change follows.
achment 1.
The basis for Zion circulating water pumps should beCommonwealth Edison h sixteen months.
each of the six service for about 90 days.It is expected that each pump will be o toverhauled du draining the associated forebay which is shared with a serviceThe ov u
of pump.
- Thus, the overhaul will disable a service wate 1
e the current technical specifications
{
water Thus, a change to the Zion Technical Sservice water pump o r pump.
Under j
e n seven days.
pecifications is needed.
l The proposed change of Attachment 1 i
of the six
{
two of the siservice water pumps to be out of service inde
, which will allow one is temporary.x n tely and The proposed change will expire on D 1981.
The current technical specification
- ays, service water pumps associated with each unit ts allow one of the three ecember 31, days.
o be inoperable for 7 A del 80082003/Y S th
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Commonwe:lth Edison Mr. Harold R. Denton, Director August 15, 1980 Page 2 The Zion FSAR (Section 9.6 and Answer to Question 9.1) and the October 6, 1972 NRC SER (pages 9-5 and 9-6) state that only two service water pumps are required for a unit in normal operation and that only one service water pump is required for emergency shutdown or accident conditions.
In addition, the power supply is arranged so that one pump is on each of the six separate essential buses.
The emergency requirements are less because during accident conditions various non-safety related flow paths are isolated.
Based on the above references, having five of six service water pumps in service will provide suf ficient coverage for any postualted loss of coolant accident coincident with a loss of of fsite power and any other single failure of an active component.
In addition, during this period, the main 48-inch service water headers for each unit will be cross-tied, thus allowing service water requirements for a unit to be satisfied by pumps from either unit.
The proposed techical specification cnanges of Attachment 1 have been reviewed and approved by Commonwealth Edison On-Site and O f f-site Review.
Commonwealth Edison has determined that this proposed amendment is a combined Class III and Class I Amendment per 10 CFR 170.22.
As such, Commonwealth Edison has enclosed a fee remmittance in the amount of $4,400.00 for this proposed amendment.
Commonwealth Edison has concluded that the proposed amendment change involves a single safety issue that does not involve a significant hazards consideration.
Since Zion Station has determined that the circulating water pump maintenance program should commence as soon as possible, Commonwealth Edison respectfully requests the NRC Staff to expeditiously review and approve the proposed changes contained herein.
Please adoress any questions that you might have concerning this matter to this office.
Commonwealth Edison Mr. Harold R. Denton, Director August 15, 1980 Page 3 Three (3) signed originals and thirty-seven (37) copies of this transmittal are provided for your review and approval.
Very truly yours,
]
(,lh t.
William F. Naughton-Nuclear Licensing Administrator Pressurized Water Reactors JSA:WFN: rap enclosure attachments SUBSCRIBED and SWORN to before me this
/ -., day of 7
1980 Notary Public 6057A l
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