ML20127E328
| ML20127E328 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 03/04/1985 |
| From: | Vandewalle D CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| NUDOCS 8505200035 | |
| Download: ML20127E328 (3) | |
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\\0 1p Consumels David J VandeWaite Company
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Nuclear Ekensing General offices: 1945 West Parnall Road. Jackson, MI 49201 e (517) 7881636 March 4, 1985 James G Keppler, Administrator Region III US Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137 DOCKET 50-255 - LICENSE DPR PALISADES PLANT -
RESPONSE TO INSPECTION REPORT 84-27 One item of noncompliance was identified in Inspection Report 50-255/84-27 dated January 31, 1985. The following is our response to this item:
Noncompliance (50-255/84-27-01)
Technical Specification 2.3, Table 2.3.1 states that a low flow trip setpoint of greater than or equal to 95% of full flow is required for four primary coolant pump operation and a setpoint of greater than or equal to 71% is required for three pump operation.
Contrary to the above:
For the time of operation during July through September 1984, all four a.
channels of four pump low flow trip were found to be less than the required 95% setpoint.
(The greatest calculated error was 0.63%.)
b.
For an indeterminate period of time, possibly since plant startup, the three pump low flow trip was set less than the required 71% setpoint.
(The greatest calculated error was 2.9%.)
Corrective Action Taken and Results Achieved The four-pump low-flow-trip has been correctly adjusted to the required limit.
The three-pump low-flow-trip has been set at a high level such that three-pump operation is precluded.
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ADOCK 05000255 MAR 1 1 1985' PDR I
OC0385-0133A-NLO4 9
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James G Keppler, Administrator' 2
Palisades Plant Response'IEIR 84-27' March 4, 1985
' Corrective Action Taken to Avoid Further Noncompliance
- The low-flow-trip surveillance procedure will be revised to ensure that-supporting tests are completed, and updated trip setpoints are utilized. A
.. corrected calculation method will be determined for the three-pump low-flow-
. trip. Procedures will be revised to include the corrected calculation. The three-pump low-flow-trip will be adjusted to allow three-pump operation following determination of the proper setpoint.
All'special test procedures will be reviewed to determine those. tests that will be repeated in the future. ~ Additional actions to ensure performance of the special~ tests will be determined as appropriate, based on the results of-
~this review.
Date-When Full Compliance Will be Achieved Full compliance has been achieved. The low-flow-trip settings have been
-adjusted to be conservative with respect to Technical Specification require-ments.- Additional actions to ensure continued compliance will be completed by September-30, 1985.
Additionally, the Inspection Report cover letter specifically requested that we address what actions we plan to take in the area of surveillance to assure "the adequacy of scheduling; data-review for acceptance and applicability; and post refueling outage review to ensure,all required special tests have'been completed".- Our response to these concerns are as follows:
.The improper trip.setpoints of this event resulted from a failure to perform a special test procedure. These procedures are provided to administrate testing that-may occur at infrequent intervals or for special conditions that will not be repeated (ie, initial fuel load tests). A special test procedure is utilized to determine the correct setpoint for the low-flow-trip following each refueling. A surveillance test. procedure is used to. implement the results of that special test.- Recurrence of this-type event will be precluded.
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upon completion of our~ review of all special test procedures. Our scheduling program will be appropriately revised to include those special tests identi-
- fied during this review.
Since the special test was not performed, and a reference to the test was not made in'the surveillance' procedure, updated trip values'were not determined.-
.Any data review subsequent to the surveillance testing would not have noted this discrepancy..
-A post' refueling outage review to ensure all required special tests have been completed would have' identified the discrepancy for the low-flow-trip set-
' point. However, a reference to the test within the applicable surveillance procedure would have provided the same result. With respect to other special DC0385-0133A-NLO4
~James G Keppler, Administrator 3
Palisades Plant Response IEIR 84-27 March 4, 1985 tests, very few are currently active. A review of these tests will indicate if a similar occurrence may be likely, and appropriate action to ensure scheduling and performance will be provided. This review will be completed by September 30, 1985.
l David J Va eWalle Director, Nuclear Licensing CC Director, Office of Nuclear Reactor Regulation Director, Office of. Inspection and Enforcement NRC Resident Inspector - Palisades
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OC0385-0133A-NLO4