ML20042B770

Forwards Request for Addl Info Re Pressurized Thermal Shock & 150-day Response to NRC .Info Should Be Submittd by 820430

ML20042B770
Person / Time
Site:	Calvert Cliffs
Issue date:	03/18/1982
From:	Clark R Office of Nuclear Reactor Regulation
To:	Lundvall A BALTIMORE GAS & ELECTRIC CO.
References
REF-GTECI-A-49, REF-GTECI-RV, TASK-A-49, TASK-OR NUDOCS 8203260050
Download: ML20042B770 (4)

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'g, YA Gray File 6-r Mr. A. E. Lundvall, Jr.

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Dear Mr. Lundvall:

During our rneting of March 3,1982 witih the Combustion Engineering Group and the three CE flSS Owners, who received our August 21, 1981 letter concerning pressurized themal shock (PTS), it was requested that we provide a fomal request for any additional information which would be desired regarding the PTS issue. The enclosure identifies the requested additional information. We mquest the information be submitted by April 30,1982.

The reporting and/or recordkeeping requirements of this letter affect fewer than ten respondents; therefore, O!1B clearance is not required under P. L.96-511.

Sincerely, Original slped W Robert A. Clark, Chief Operating Reactors Branch #3 Division of Licensing

Enclosure:

Request for Additional Infomation cc w/ enclosure:

See next page l

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i PDR ADDCK 05000317 DFFICIAL RECORD COPY usom ini-mua NRC P

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Baltimore Gas and Electric Company cc:

James A. Biddison, Jr.

Ms. Mary Harrison, President General Counsel Calvert County Board of County Commissioners Baltimore Gas and Electric Company Prince Fredcrick, m 20768 P. O. Box 1475 i

. Baltimore, MD 21203 U. S. Environmental Protection Agency Region III Office GGorge F. Trowbridge, Esquire Attn: Regional Radiation Representative Shaw, Pittman, Potts and Trowbridge Curtis Building (Sixth Floor) 1800 M Street, N. W.

Sixth and Walnut Streets Washington, D. C.

20036 Philadelphia, PA 19106 l

Mr. R. C. L. Olson, Principal Engineer Mr. Ralph E. Architzel Nuclear Licensing Analysis Unit Resident Reactor Inspector Baltimore Gas and Electric Company NRC Inspection and Enforcement Room 922 - G8E Building P. O. Bos 437 P. O. Box 1475 Lusby, m 20657 Baltimore, MD 21203 Mr. Charles B. Brinkman Mr. Leon B. Russell Manager - Washington Nuclear Operations i

Plant Superintendent Combustion Engineering, Inc.

Calvert Cliffs Nuclear Power Plant 4853 Cordell Avenue, Suite A-1 i

Maryland Routes 2 & 4 Bethesda, MD 20014 Lusby, MD 20657 Mr. J. A. Tieman, Manager Bechtel Power Corporation Nuclear Power Department Attn: Mr. J. C. Judd Calvert Cliffs Nuclear Power Plant Chief Nuclear Engineer Maryland Routes 2 & 4 t

15740 Shady Grove Road Lusby, MD 20657 Gaithersburg, MD 20760 Mr. W. J. Lippold, Supervisor Combustion Engineering, Inc.

Nuclear Fuel Management Attn: Mr. P. W. Kruse, Manager Baltimore Gas and Electric Company Engineering Services Calvert Cliffs Nuclear Power Plant P. O. Box 500 P. O. Box 1475 Windsor, CT 06095 Baltimore, Maryland 21203 Public Document Room Mr. R. E. Denton, General Supervisce Calvert County Library Training & Technical Services Prince Frederick, MD 20678 Calvert Cliffs Nuclear Power Plant Maryland Routes 2 & 4 l

Director, Department of State Planning Lusby, m 20657 301 West Preston Street Bc1timore, MD 21201 Mr. R. M. Douglass, Manager i

Quality Assurance Department Administrator, Power Plant Siting Program i

Fort Smallwood Road Complex Energy and Coastal Zone Administration i

P. O. Box 1475 Department of Natural Resources j

Baltimore, MD 21203 Tawes State Office Building i

Annapolis, m 21204 l

Mr. T. L. Syndor, General Supervisor j

Operations Quality Assurance i

Calvert Cliffs Nuclear Power Plant Regional Administrator

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Maryland Routes 2 & 4 Nuclear Regulatory Commission,-Region I j

Lusby, MD 20657 Office of Executive Director for Operations 631 Park Avenue King of Prussia, Pennsylvania 19406

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1 Enclosure i

REQUEST FOR ADDITIONAL INFORMATION CONCERNING PRESSURIZED THERMAL SH0CK AND l

REGARDING THE "150 DAY" RESPONSE TO NRC LETTER DATED AUGUST 21, 1981 j

i FOR l

CALVERT CLIFFS 1 DOCKET NO. 50-317 pncerning Operator Actions 1.

In CEN-189, only two cases are considered for a SBLOCA with concurrent loss of teedwater.

In one case, PORVs are opened by the operator at 10 minutes to prevent core uncovery.

In the other case, feedwater is restored to the steam generator in 30 minutes to prevent core uncovery.

For both cases, the report stated that 15-30 minutes would provide l

ample time to initiate feedwater prior to dryout.

Provide the analysis or basis to justify that 15 to 30 minutes is ample time for correct i

operator action.

2.

In CEN-189, provide an evaluation of the sensitivity of the transient i

to the time assume; for operator action (i.e., if the operator opens the PORVs at 15 minutes, or 30 minutes, or restores feedwater alone at 15 minutes, or 20 minutes, or 45 minutes, what are the resulting pres-i sure/ temperature transients?).

l 3.

In the Calvert Cliffs 1 steam line break analyses, it is assumed that the operator trips reactor coolant pumps in 30 seconds, and reduces high pressure injection and charging flow to control plant pressure.

l Provide an evaluation of the sensitivity of the transient to the tine assumed for operator action.

4.

In your evaluation, the actions described do not provide the operator with clear direction for dealing with conflicting concerns that need l

to be evaluated when considering the operation of HPI and the charging i

flow as it relates to vessel integrity and maintaining core cooling.

Provide an evaluation of the need and effectiveness of procedure modi-fications to clearly identify the concems in the emergency operating procedures themselves. This should be done in contrast of depending upon upgrading operator training alone.

5.

You have indicated that you are participating in a Combustion Engineering Owners' Group program which includes the review of plant operating pro-cedures for the proper integration of specific guidance on pressurized thennal shock. The resulting pmcedural modifications should clearly identify the conflicting cc1cerns. We request that you provide a more specific schedule for upgraving procedures.

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