ML20132F846
| ML20132F846 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 07/03/1985 |
| From: | Tucker H DUKE POWER CO. |
| To: | Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| NUDOCS 8508020409 | |
| Download: ML20132F846 (2) | |
Text
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/hLtl,Lr.l DUKE POWER GOMPANY P.O. ISOX 33180 CIIARLOTTE, N.C. 28242 HAL B. TUCKER Tetzenown vara emessnest (704) 373-4 &31 July 3, 1985
-...o avio.
Dr. J. Nelson Grace, Regional Administrator U. S. Nuclear Regulatory Commission Region II c.
101 Marietta Street, NW, Suite 2900 W
Atlanta, Georgia 30323
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Subject:
Oconee Nuclear Station
-c IE Inspection Report 50-269/85-10 P
50-270/85-10 50-287/85-10 N
Dear Sir:
In response to your letter dated June 3, 1985 which transmitted the subject Inspection Report, the attached response to the cited items of non-compliance is provided.
Very truly yours, f
Hal B. Tucker SGG:slb Attachment cc:
Mr. J. C. Bryant NRC Resident Inspector Oconee Nuclear Station 8500020409 f 9
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1 Violation Technical Specification 3.5.2.5.c specifies position limits for the regulating and axial power shaping control rods. The technical specifications' curves are based on shutdown margin; they specify regions for unacceptable operation and restricted operation.
Contrary to the above, the control rod position limits were exceeded on April 21, 1985 during Unit 2 power escalation following a refueling outage. The control rods were determined to be in the region of unacceptable operation based on reactor power of 15%
with group 5 control rods at 70% withdrawn. Though position limits were exceeded, the required 1% delta k over k shutdown margin was available.
This is a Severity Level IV violation (Supplement I).
Response
1)
Admission or denial of the alleged violations:
This violation is admitted as written.
2)
Reasons for the violation if admitted:
This violation resulted from personnel error, failure of Operations personnel to maintain control rod group position within the Technical Specification limits.
Additional details are contained in LER 50-270/85-03, dated Fby 21, 1985.
3)
Corrective steps which have been taken and the results achieved:
The immediate corrective action was to borate the Reactor Coolant System until the rods were within the acceptable operating region.
In addition, involved personnel were counseled.
4)
Corrective steps which will be taken to avoid further violations:
A)
Operations management will provide training to their personnel to increase awareness of rod position ibnits during power maneuvers.
B)
Appropriate operating procedures will be revised to remind the control room operators to consult the rod position limit curves prior to increasing power into the power range.
C)
Subsequent Power Escalation Test Procedures will include verification that Operations personnel are aware of Rod Index requirements prior to increasing power.
D)
The Rod Index Program for the Operator Aid Computer will be revised to assure proper alarms are received prior to exceeding rod position limits.
5)
Date when full compliance will be achieved:
The corrective actions noted in (4) above will be completed as follows:
A)
November 1, 1985 B)
August 1, 1985 C)
Prior to Unit 3, Cycle 9 startup testing D)
September 1, 1985.
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