ML17191A843
| ML17191A843 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 08/07/1998 |
| From: | Grant G NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Kingsley O COMMONWEALTH EDISON CO. |
| Shared Package | |
| ML17191A844 | List: |
| References | |
| 50-237-98-19, 50-249-98-19, NUDOCS 9808270310 | |
| Download: ML17191A843 (3) | |
See also: IR 05000237/1998019
Text
UNITED STATES
NUCLEAR REGULATORY COMMISSION
REGION Ill
Mr. Oliver D. Kingsley
President, Nuclear Generation Group
Commonwealth Edison Company
ATTN.: Regulatory Services
Executive Towers West Ill
Downers Grove, IL 60515
801 WARRENVILLE ROAD
. LISLE, ILLINOIS 60532-4351
August 7, 1998
SUBJECT:
DRESDEN INSPECTION REPORT 50-237/98019(DRP); 50-249/98019(DRP)
Dear Mr. Kingsley:
On May 28 through July 14, 1998, the NRC performed an inspection at your Dresden Nuclear
Power Station. The enclosed report presents the results of this inspection.
During the inspection period, a safety-conscious approach characterized the overall conduct of
activities at the Dresden station. However, several issues showed that challenges to smooth
operation remained at the station.
During the inspection period, another unplanned automatic reactor scram occurred. This Unit 2
scram occurred because of the material condition of the pumps in the electro hydraulic control
system. Material condition problems affecting equipment availability were also experienced with *
the Unit 2 emergency diesel generator, the security diesel generator and the containment cooling
service water pumps. While we recognize your efforts at scram reduction and improvements in *
material condition, these events demonstrated that continued attention is still needed for both of
these areas.
Three times during this period, operators failed to recognize conditions that required entry into
Technical Specification limiting conditions for operation. Two of these were related to
misunderstandings by the operators regarding the impact of maintenance activities on equipment
operability. In the other instance, the operations and engineering staffs failed to assure prompt
and complete resolution of a failure of post-accident monitoring instrumentation. We are
concerned about this item because NRC involvement was required to bring the matter to station
management's attention, and the resolution of the issue was slow and incomplete*.
During the period, operators experienced difficulty in restoring the core spray system following
on-line maintenance. The delay in system restoration resulted in unnecessary outage time for
the core spray system. The delay was associated with performance of the maintenance on-line
for the first time. This issue is of concern because this was the second recent occurrence where
work performed on-line for the first time caused unanticipated consequences.
9808270310 980807
ADOCK 05000237
G
PDR.
0. Kingsley
-2-
Based on the results of this inspection, the NRC has determined that violations of NRC
requirements occurred. These violations are cited in the enclosed Notice of Violation (Notice)
and the circumstances surrounding them are described in detail in. the subject inspection report.
The first violation is of concern because it represented a negative trend in recognition of activities
covered by Technical Specifications. The second violation is of concern because it involved a
very slow resolution of degraded Technical Specification-required instrumentation. Although the
first violation involved issues identified by your operations staff, the violation is being 'issued
because of the repetitiveness of the problem .. The third violation regarded submittal of the core
operating limits report, and was of concern because it represented additional examples of failing
to follow Technical Specifications.
You are required to respond to this* letter and should follow the instructions specified in the
enclosed Notice when preparing your response. In your response to the violation for failing to log
entry into limiting conditions for operation, please address the issue of recognition of situations
covered by Technical Specifications limiting conditions for operations.
In accordance with 1 O CFR 2. 790 of the NRC's "Rules of Practice," a copy of this l~tter, the
enclosures, and your response will be placed in the NRC Public Document Room.
Docket Nos.: 50-237; 50-249
Enclosures:.
Sincerely,
/s/ Geoffrey E. Grant
Geoffrey E. Grant, Director
Division of Reactor Projects
2. Inspection Report 50-237/98019(DRP);
50-249/98019(DRP) *
See Attached Distribution
DOCUMENT NAME: G:\\DRES\\DRE98019.DRP
To receive a copy of thl* document, Indicate In the box *c* = Copy without attachment/encloeure "E" = Copy with attachment/encloeure
"N" = No co
0. Kingsley
-3-
cc w/encls:
M. Wallace, Senior Vice President
D. Helwig, Senior Vice President
G. Stanley, PWR Vice President
J. Perry, BWR Vice President
Distribution:
SAR (E-Mail)
D. Farrar, Regulatory
- Services Manager
I. Johnson, Licensing Director
DCD - Licensing
M. Heffley, Site Vice President
P. Swafford, Station Manager
F. Spangenberg, Regulatory Assurance
Manager
R. Hubbard
N. Schloss, Economist
Office of the Attorney General
State Liaison Officer
Chairman, Illinois Commerce
Commission
Project Mgr., NRR w/encls
J. Caldwell, Riii w/encls
C. Pederson, Riii w/encls
B. Clayton, Riii w/encls
SRI Dresden w/encls
DRP w/encls
TSS w/encls
DRS (2) w/encls
Riii PRR w/encls
PUBLIC IE-01 w/encls
Docket File w/encls
GREENS
IEO (E-Mail)
DOCDESK (E-Mail)
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