ML17222A714

Summary of 890309 Meeting W/Util in Rockville,Md Re Proposed Mods to Plant to Meet Requirements of ATWS Rule

ML17222A714
Person / Time
Site:	Saint Lucie
Issue date:	03/09/1989
From:	Norris J Office of Nuclear Reactor Regulation
To:	Office of Nuclear Reactor Regulation
References
TAC-59144, NUDOCS 8903170410
Download: ML17222A714 (5)

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+y*g4 UNITEDSTATES NUCLEAR REGULATORYCOMMISSION WASHINGTON, D. C. 20555 March 9, 1989 Docket Nos.

50-335 and 50-389 LICENSEE:

Florida Power and Light Comp'any FACILITY: St. Lucie Units 1 and 2

SUMMARY

OF MEETING HELD WITH FLORIDA POWER 5 LIGHT COMPANY (THE LICENSEE)

TO DISCUSS IMPLEMENTATION OF 10 CFR 50.62 - ANTICIPATED TRANSIENT WITHOUT SCRAM (ATWS) RULE (TAC NO. 59144)

A meeting was he'Id at the NRC offices in Rockville, Maryland on March 1, 1989, to discuss the proposed modifications of the St. Lucie Plant to.meet the require-ments of the ATWS Rule.

As the first order of the meeting, the licensee committed to the implementation of the modifications for both units during the 1990 refueling outages (see Enclosure 1). "The licensee then outlined the history of the effort as related to the St. Lucie Plant and presented an outline of the design concepts (see Enclosure 2).

During the course of the meeting the staff requested that the licensee:

1.

Provide a discussion of the at-power testing features of the ATWS circuits.

2.

3.

Provide a comitment that end-to-end testing, from sensor input to actuated device, will be performed during each refueling outage.

Provide a comitment that any electrical isolation device used in a 1E to non-1E interface will be qualified in accordance with the requirements of Attachment A to the NRC letter dated May 18, 1988.

4.

Re-'examine the matrix relays with respect to contact wipe and configuration differences between Reactor Protection System (RPS) and Auxiliary Feedwater Actuation System (AFAS) matrix relays.

5.

Provide a discussion on how the Diverse Turbine Trip (DTT) meets the requirements of the ATWS Rule, i.e., discussion of the design criteria.

6.

Examine the Diverse Scram System (DSS) power source options as listed below:

a.

The elimination of the output isolators in Engineered Safety Features Actuation System (ESFAS) cabinets SA and SB and using non-RPS assuciated power on the DSS circuits in those..cabinets.

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March 9, 1989 Discussion:

The ESFAS cabinets are safety-related cabinets and the DSS circuits in those cabinets are non-safety-related.

The physical separation requirements between safety-related and non-safety-related circuits in the same enclosure must be followed.

The electrical isolators in ESFAS cabinets t@,

MB, and t<D would represent the safety-related to non-safety-related boundary.

b.

The use of RPS associated power throughout the DSS accompanied by a Failure Modes and Effect Analysis (FNEA) performed on the DSS circuits.

Discussion:

This option essentially upgrades the DSS to safety-grade'tatus and the criteria for safety-grade status should be followed. It should be noted that the Calvert Cliffs DSS circuits use RPS power throughout and are four channel, safety-related, redundant circuits with the output stage also being redundant.

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7. 'ubmit bimonthly reports on the progress of the effort with the objective of assuring that the implementation dates will be met.

The attendance list is shown on Enclosure 3.

Enclosures:

1.

Letter 2.

Agenda 3.

Attendance list Original signed by Jan A. Norris, Sr. Project Manager Project Directorate II-2 Division of Reactor Projects I/II cc w/enclosures:

See next page

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Mr. W. F.

Conway Florida Power 5 Light Company St. Lucie Plant CC Mr. Jack Shreve Office of the Pub 1 ic Counsel Room 4, Holland Building Tallahassee, Florida 32304 Resi dent Inspector c/o U.S.

NRC 7585 S.

Hwy A1A Jensen Beach, Florida 34957 State Planning 8 Development Clearing huu se Office of Planning 5 Budget Executive Office of the Governor The Capitol Building Ta 1 1ahassee, Florida 32301 Harold F. Reis, Esq.

Newman 5 Holtzinger 1615 L Street, N.W.

Washington, DC 20036 John T. Butler, Esq.

Steel, Hector and Davis 4000 Southeast Financial Center Miami, Florida 33131-2398 Administrator Department of Environmental Regulation Power Plant Siting Section State of Florida 2600 Blair Stone Road Tallahassee, F1ori da 32301 Mr. Weldon B. Lewis, County Administrator St. Lucie County.

2300 Virginia Avenue, Room 104 Fort Pierce, Florida 33450 Mr. Charles B. Brinkman, Manager Washington Nuclear Operations Combustion Engineering, Inc.

12300 Twinbrook Parkway, Suite 330 Rockville, Maryland 20852 Mr. Jacob Daniel Nash Office of Radiation Control Department of Health and Rehabi litative Servi ces 1317 Winewood Blvd.

Ta 1 lahassee, F 1ori da 32399-0700

-Regional Administrator, Region II U.S. Nuclear Regulatory Commission 101 Marietta Street N.W., Suite 2900 Atlanta, Georgia 30323 Mr. Campbell Rich 4626 S.E. Pilot Avenue Stuart, Florida 34997