ML19250C316

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Responds to NRC 791012 Ltr Re Violations Noted in IE Insp Rept 50-298/79-14.Corrective Actions:Personnel Reminded to Make Complete Log Entries
ML19250C316
Person / Time
Site: Cooper Entergy icon.png
Issue date: 10/18/1979
From: Pilant J
NEBRASKA PUBLIC POWER DISTRICT
To: Seyfrit K
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19250C315 List:
References
NUDOCS 7911230198
Download: ML19250C316 (2)


Text

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  • COOPER NUCLEAR STAT 1oN P.O. DoX 98, BRoWNVILLE. NEDR ASKA 68321

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Nebraska Publ.ic Power Distn.c t -_____-

TELEPnoNE n m us-a m October 18, 1979 Mr. Karl Seyfrit, Director U.S. Nuclear Regulatory Commission Office of Inspection and Enforcement Region IV 611 Ryan Plaza Suite 1000 Arlington, Texas 76011

Subject:

NPPD Response to IE Inspection Report 50-298/79-14

Dear Mr. Seyfrit:

This letter is written in response to the letter dated October 12, 1979, transmitting IE Inspection Report 50-298/79-14 which indicated that certain of our activities were not conducted in full compliance 7ith NRC requirements.

Statement of Deficiency A Technical Specification 6.6.1 requires that records of normal station operation shall be kept'in a manner convenient for review. Further Cooper Nuclear Station Administrative Procedure 1.4, Section 1.4.4.1.1 requires that entries are to be made to the Shift Supervisor's Log regarding changes in status of critical station components, malfunction of equipment, and items of significant historical value. Further, Cooper Nuclear Station Administrative Procedure 1.4, Section 1.4.4.1.4 requires that the Control Room Log contain information regarding Reactor Power and Recirculation Loop Flows.

Contrary to the above, on or about September 18, 1979, while the reactor operator was attempting to reset a scoop tube lockout on the Reactor Recirculation Motor Generator (RRMG) set, the RRMG ran back to minimum speed and then returned to 93 percent. This operational transient caused a significant, unexpected change in reactor power and Recirc-ulation Loop Flows. Neither the Shift Supervisor's Log nor the Control Room Log contained any reference to this event.

Discussion RR MG Set "A" was being operated using a temporary electrical and mechan-ical stop installed per Special Test Procedure 79-9. The temporary-electrical and mechanical stop was installed to limit an unexpected speed increase to approximately 3% to 5%, at which time the electrical stop limit switch would open the control loop which would initiate a scoop tube lockout.

I388 180 7911280 /k

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Mr. Karl Seyfrit October 18, 1979 Page 2.

Or. September 18, 1979, during a power increase, the limit switch was inadvertently tripped, opening the control loop initiating a scoop tube lockout. When the lockout was reset, the RR MG Set "A" ran back to minimum and then ramped back to approximately 93% speed at a controlled rate where it had been previously. set.

The Operations Supervisor was immediately informed of the transient. At his request, the Instrument and Control Engineer evaluated the cause of the event and provided a written response to him which was routed to the Shift Supervisors with instructions to discuss the occurrence and proper corrective action with their shift personnel. The event was also brought _

to the attention of the Station Superintendent and SORC members. Thus, even though the event was not logged as per procedures, it was brought to the attention of appropriate personnel for necessary review and action.

Corrective Steps Which Have Been Taken And The Results Achieved This deficiency was discussed with the Shift Supervisor and Licensed Operators involved and a general entry was made in the Night Orders Log to remind all personnel of. making proper log entries. To date, there has been an improvement in the log entries made by Operations personnel.

Corrective Steps Which Will Be Taken To Avoid Further Noncompliance This incident was brought to the attention of the Operations personnel.

The importance of complete log entries was stressed as well as the need to follow plant procedures.

Date When Full Compliance Will Be Achieved Full compliance has been achieved as of October 18, 1979.

If you have any questions regarding this response, please contact me.

Sincerely, J. M. Pilant 3 , .

Director of Licensing and Quality Assurance

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