ML20247N836
| ML20247N836 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 05/15/1998 |
| From: | Grobe J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Kingsley O COMMONWEALTH EDISON CO. |
| References | |
| 50-373-96-11, 50-374-96-11, NUDOCS 9805270236 | |
| Download: ML20247N836 (2) | |
See also: IR 05000373/1996011
Text
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WDhDC[2>
May 15, 1998
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Mr. Oliver D. Kingsley
President, Nuclear Generation Group
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Commonwealth Edison Company
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ATTN: Regulatory Services
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Executive Towers West til
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1400 Opus Place, Suite 500
Downers Grove,IL 60515
SUBJECT:
REVISION OF RESPONSE TO INSPECTION REPORT 50-373/96011;
50-374/96011 REGARDING SERVICE WATER TUNNEL SAFETY
CLASSIFICATION UPGRADE
Dear Mr. Kingsley:
This acknowledges receipt of your letter dated April 24,1998, notifying us of a planned change
to a commitment made in your letter dated December 20,1996, in response to issues identified
in NRC inspection report 50-373/96011; 50-374/96011. In your original response, you indicated
that the 36-inch pipes and the manual isolation valves to the service water tunnel would be
upgraded in safety classification. However, during the course of the evaluation of the upgrade,
you determined that the upgrade had no benefit since the evaluation revealed that the 36-inch
pipes were located downstream of the nonsafety-related, non-seismic traveling screens.
We have reviewed your change to the response originally submitted and have no further
questions at this time. This change will be examined during future inspections.
Sincerely,
original /s/ by J. A. Grobe
John A. Grobe, Director
Division of Reactor Safety
Docket Nos.: 50-373;50-374
Enclosure: Ltr dtd 4/24/98 from F. Dacimo,
Comed to USNRC
See Attached Distribution
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DOCUMENT NAME: G:\\DRS\\LAS05158.TY
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To receive a co py of this document, indicate in the box *C' = Copy w/o attach /enci *E' = Copy w/ attach /enci "N" = No copy
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. O. Kingsley
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M. Wallace, Senior Vice President
D. Helwig, Senior Vice President
G. Stanley, PWR Vice President
J. Perry, BWR Vice President
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D. Farrar, Regulatory
' Services Manager
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I.' Johnson, Licensing Director
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F. Dacimo, Site Vice President
T. O'Connor, Station Manager
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P. Bames, Regulatory Assurance
Supervisor
Richard Hubbard .
Nathan Schloss, Economist
Office of the Attorney General
State Liaison Officer
Chairman, Illinois Commerce
Commission
Distnbution:
Project Mgr., NRR w/ encl
A. Beach w/enci
J. Caldwell w/enci -
B. Clayton w/enci
SRI LaSalle w/enci
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Imalle Generating Station
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United States Nuclear Regulatory Commission
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Attention: Document Control Desk
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Washington, D.C. 20555
FILE
Subject:
Clarification to System Operational Performance
Inspection, (NRC Inspection Report No. 50.373/96011
LaSalle County Station, Units 1 and 2
Facility Operating License NPF-11 and NPF-18
NRC Docket Nos. 50-373 and 50-374
References:
1.
G. E. Grant Letter to W. T. Subalusky, dated
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November 15,1996, Transmitting NRC
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Inspection Report 50-373/374-96011
2.
W. T. Subalusky to U. S. NRC letter dated
December 20,1996, transmitting LaSalle
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County's response to NRC Inspection Report
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50-373/374-96011
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In the Reference 2 letter, LaSalle County stated that the 36-inch pipes and
the manual isolation valves to the Service Water Tunnel were being
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upgraded in safety classification.
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During the course of evaluating the upgrade, it was determined that the
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upgrade had no benefit. The evaluation showed that the 36-inch pipes were
located downstream of the non safety related, non-seismic traveling water
screens. The traveling water screens are not supplied from essential
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busses, which would result in their loss of function during a loss of offsite
power. Therefore, no credit is taken for the 36-inch pipes for supplying
safety related service water following a loss of offsite power event.
Additionally, the upgrade of the 54-inch CSCS Bypass line and associated
valve to safety related status is adequate to ensure a safety-related supply
of cooling water to the plant. Based on this, upgrading the commercial
grade components currently installed on the 36-inch inlet lines to the Service
Water Tunnel is not technically justified and LaSalle will not upgrade the
safety classification of the 36-inch inlet lines.
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'LaSalle Station is on sch d l to complete the upgrade of the 54-inch CSCS
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bypass line to safety-related status prior to Unit 1 restart.
If there are any questions or comments concoming this letter, please refer
them to Harry Pontious, Regulatory Assurance Manager, at (815) 357-6761,
extension 2383.
Res
ully,
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Fred Dacimo
Site Vice President
LaSalle County Station
VA. B. Beach, NRC Region lil Administrator
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M. P. Huber, NRC Senior Resident inspector - LaSalle
D. M. Skay, Project Manager - NRR - LaSalle
F. Niziolek, Office of Nuclear Facility Safety - IDNS
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