ML20212R667

Summary of 870327 Meeting W/Util in Bethesda,Md Re Existing Procedures & Planned Mods for Shutdown in Advance of Severe Weather & Anticipated Salt Spray Buildup.W/O List of Attendees & Agenda

ML20212R667
Person / Time
Site:	Millstone
Issue date:	04/09/1987
From:	Doolittle E Office of Nuclear Reactor Regulation
To:	Office of Nuclear Reactor Regulation
References
NUDOCS 8704270311
Download: ML20212R667 (2)

Text

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CMW Q .

! Distribution Docket File J. Partlow l NRC/ Local PDR E. Jordan i PAD 5 Reading OGC-Beth.

Docket No. 50-423 B. Doolittle B. Grimes V. Nerses T. Novak D. Jaffe ACRS (10) ',

L. Brown C. E. Rossi File 3.lc J. T.'Snedlosky R.L. O tm.

l LICENSEE: Northeast Nuclear Energy Company l

l FACILITY: Millstone Nuclear Power Station, Unit 3

SUMMARY

OF MEETING WITH NORTHEAST NUCLEAR ENERGY COMPANY TO DISCUSS SPUTDOWN OF MILLSTONE 3 IN ADVANCE OF SEVERE WEATHER CONDITIONS A meeting was held with Northeast Nuclear Energy Company on. March.27, 1987 at NRC Headquarters in Bethesda, Maryland. The NRC staff was represented by members of the Office of Nuclear Reactor Regulation, Division of PWR Licensing A and B, and the Millstone 3 Senior Resident Inspector from Region I. The i licensee was represented by members of Northeast Nuclear Energy Company.

A list of attendees is included as Enclosure 1.

The purpose of this meeting was to discuss NNEco's existing procedures and planned modifications for shutdown of Unit 3 in advance of severe weather and-anticipated salt spray buildup, and precautionary steps prior to and during reactor shutdown.

Following an introduction by Wayne D. Romberg, Vice President Nuclear Operations, Ravi Joshi, NNECo licensing representative reviewed the meeting agenda, contained as Enclosure 2. Mr. Joshi reviewed activities leading to the staff's issuance of 4 Backfit requirements to reduce the contribution to core melt frequency from station blackout and NNECo's subsequent appeal of Backfit Item-1; Technical Specification to cool down in advance of severe weather conditions.

l Pr. Carl Clement, Millstone 3 Superintendent continued the licensee's l presentation with a discussion of Table 4-1C, Emergency Action Levels contained in the Millstone 3 Emergency Plan. The licensee noted that action taken in advance of severe weather conditions at Millstone 3 begins with actuation of the Station Emergency Organization (SEO) under ALERT conditions when winds are near 85 mph. The licensee emphasized that the SEO includes

, meteorological experts and transmission system experts and, in the' licensee's t

own best interest, is assembled well before ALERT emergency action levels are reached. NNECo referred to their actions prior to and during Hurricane Gloria as an example of preparation and shutdown in advance of a hurricane according to the philosophy represented in the EALs.

8704270311 DR 870409 ADOCK 05000423 PDR

In response to a question from the staff concerning the basis for specific wind speeds listed in the EALs, NNECo stated that the transmission system at Unit 3 is designed to sustain winds of 90 mph. Although the staff noted that Station Procedure ONP 514A, Rev. 2, Unit 1 Natural Occurrences appeared to contain more specific actions than Station Procedure AOP 3569, Rev.1, Severe Weather Conditions, and seemed to be more restrictive, NNECo stated that ONP 514A was keyed on a limiting windspeed of 60 mph. The licensee continued by saying that the Unit 1 procedure will be changed to be more like the Unit 3 procedure.

Mr. Clement continued the presentation by showing that the next level of protection if the EALs fail is provided by Station Procedure A0P 3569, Severe Weather Conditions. He stated that A0P 3569 will be strengthened to specify that if windspeed is expected to exceed 75 mph in the next 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />, refer to Emergency Action Levels Table 4-1C for appropriate implementation of the Emergency Plan; if windspeed is expected to exceed 90 mph within the next 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />, the plant will be shutdown with the RCS cooled to less than 400*F; and a cautionary statement will be added stating that the reactor should be cooled to less than 400 F in the event that one or more Emergency Diesel Generators is not operable or that offsite power is lost or becomes unreliable. These changes as provided by the licensee are included as Enclosure 3.

The licensee concluded its presentation by stating.that utilization of the Emergency Plan and the procedures exceeds the intent of what the staff asked for in Back Item-1 of its letter.

The NRC staff concluded by agreeing that if the procedures will accomplish the staff's objectives for shutdown in advance of severe weather than there is no need to put this information in the Tech Specs. However, the staff requested that the licensee include a cautionary note on monitoring equipment when the potential for salt spray exists.

In summary the NRC staff stated that it will not require a Tech Spec to cool down in advance of severe weather conditions. It was agreed that the licensee will provide a letter referring to Station Procedure AOP 3569 as nodified and include a cautionary statement regarding the potential for salt spray.

Elizabeth L. Doolittle, Project Manager PWR Project Directorate #5 Division of PWR Licensing-A

Enclosures:

l As stated cc: See next page PA- -

,E9 ttleL:jch e /C/87 4