ML20155H019

Notice of Violation from Insp on 880410-0528.Violation Noted:Operation at Power Level in Excess of 75% Beginning Approx on 880510 W/O Timely Calibr of Power Range High Neutron Flux Trip Setpoint

ML20155H019
Person / Time
Site:	Braidwood
Issue date:	06/15/1988
From:	Forney W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
To:
Shared Package
ML20155H004	List: IR 05000456/1988013 ML20155H002 ML20155H019
References
50-456-88-13-01, 50-456-88-13-1, NUDOCS 8806200170
Download: ML20155H019 (1)

Text

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I NOTICE OF VIOLATION Commonwealth Edison Company Docket No. 50-456 As a result of the inspection conductad from April 10 through May 29, 1988, and in accordance with the "General Policy and Procedures for NRC Enforcement Actions," 10 CFR Part 2, Appendix C (1987), the following violations were identified:

a. Technical Specification 3/4.3.1, "Reactor Trip System Instrumentation,"

lists the trip instrumentation that must be operable in Table 3.3-1.

Operability is verified by the surveillances listed in Table 4.3-1.

Table 4.3-1, Item 2, requires that the Power Range, Neutron Flux High Setpoint incore-excore calibration be performed quarterly. Note 6 requires that the power level be greater than 75% of rated thennal power.

Contrary to the above, the Unit I reactor was operated at a power level in excess of 75% beginning approximately on May 10, 1988, for a period of over 13 days without a timely calibration of the Power Range High Neutron Flux Trip Setpoint. The latest allowabl-e date for performance of this calibra-tion in accordance with the quarterly periodicity was March 23, 1988.

This is a Severity Level IV violation (Supplement I). (456/88013-01(DRP))

b. Limiting Condition for Operation (LCO) 3.7.6 requires the operability of two independent control room ventilation (VC) systems. For Modes 5 and '

6 LC0 3.7.6 states, "With one Control Room Ventilation System inoperable, restore the inoperable system to operable status within 7 days or initiate and maintain operation of the remaining operable Control Room Ventilation System in the makeup mode."

Contrary to the above, with Unit 1 in Mode 5, Train B of the VC system was inoperable (rendered incapable of maintaining a control room tempera-ture of less than or equal to 90*F) for approximately 22 days (March 16, 1988 to April 7, 1988) without action to place the remaining operable train in the makeup mode.

This is a Severity Level IV violation (Supplement I). (456/88013-02(DRP))

With respect to item b, the inspection showed that action had been taken to correct the identified violation and to prevent recurrence. Consequently, no reply to the violation is required, and we have no further questions regarding this matter. With respect to item a, pursuant to the provisions of 10 CFR 2.201 you are required to submit to this office within thirty days of the date of this Notice a written statement or explanation in reply, including for each violation: (1) corrective action taken and the results achieved; (2) corrective action to be taken to avoid further violations; and (3) the date when full compliance will be achieved. Consideration may be given to extending your response time for good cause shown.

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Dated William L. Forkf, Chief ~

Reactor Projects Branch 1 g

8806200170 880615 PDR ADOCK 0500045/.

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