ML20137S961

Discusses Inconsistency in Amend 55 to FSAR Re Protection of Control Room Operators Against Chlorine Release Accident. Control Room Pressurization Flow Rate Higher by Factor of Two than Guidance in Reg Guide 1.95

ML20137S961
Person / Time
Site:	Comanche Peak
Issue date:	09/25/1985
From:	Noonan V NRC - COMANCHE PEAK PROJECT (TECHNICAL REVIEW TEAM)
To:	Counsil W TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
References
RTR-REGGD-01.095, RTR-REGGD-1.095 NUDOCS 8509300550
Download: ML20137S961 (5)

Text

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NUCLEAR REGULATORY COMMISSION o

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su n as Dockets Nos.: 50-445 and 50-446 Mr. W.G. Counsil Executive Vice President Texas Utilities Generating Company 400 North Olive Street, L.B. 81 Dallas, Texas 75201

SUBJECT:

INCONSISTENCY IN AMENDMENT 55 0F COMANCHE PEAK FSAR RELATIVE TO PROTECTION OF CONTROL ROOM OPERATORS AGAINST CHLORINE RELEASE (SECTION 6.4)

The Accident Evaluation Branch has reviewed Amendment 55 to the Comanche Peak FSAR, and finds that there is an inconsistency relative to the protection of control room operators against a chlorine release accident. The air exchange rate shown in Table 1 of Regulatory Guide 1.95 is equivalent to the control room pressurization flow rate necessary to maintain an 1/8 inch water gage pressure differential, not the 1.nfiltration rate as presumed in Section 6.4.2.3 of Amendment 55. The significance of this error from a safety standpoint is that the 800 CFM pressurization flow rate proposed by the utility remains unjustified. The flow rate is about a factor of two higher than the guidance in Regulatory Guide 1.95 for the protection of operators following a design basis chlorine release.

We have discussed our concerns on this problem with members of your staff; i.e. R. Dacko, et al. My staff will also arrange any conference calls or meetings needed to resolve this issue. Please advise my staff of your schedule.

Sincerely, d an, Director S

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0509300550 050925 PDR ADOCK 05000445 F

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W. G. Count,il Comanche Peak Steam Electric Station Texas Utilities Generating Company Units 1 and 2 cc:

Nicholas S. Reynolds, Esq.

Resident Inspector /Com*anche Peak Bishop Libennan, Cook, Nuclear Power Station Purcell & Reynolds c/o U.S. Nuclear Regulatory Comission 1200 Seventeenth Street, NW P. O. Box 38 Washington, D.C.

20036 Glen Rose, Texas 76043 Robert A. Wooldridge, Esq.

Regional Administrator, Region IV Worsham, Forsythe, Sampels &

U.S. Nuclear Regulatory Comission Wooldridge 611 Ryan Plaza Drive, Suite 1000 2001 Bryan Tower, Suite 2500 Arlington, Texas 76011 Dallas, Texas 75201 Mr. Homer C. Schmidt Larry A. Sinkin

~ Manager - Nuclear Services 3022 Porter Street, NW #304 Texas Utilities Generating Company Washington, D.C.

20008 Skyway Tower 400 North Olive Street, L.B. 81 Dallas, Texas 75201 Mr. Robert E. Ballard, Jr.

Ms. Sillie Pirner Garde Director of Projects Citizens Clinic Diractor Gibbs and Hill, Inc.

Government Accountability Project 11 Pen Plaza 1901 Que Street, NW New York, New York 10001 Washington, D.C.

20009 David R. Pigott, Esq.

Mr. A. T. Parker Orrick, Herrington & Sutcliffe Westinghouse Electric Corporation 600 Montgomery Street P. O. Box 355 San Francisco, California 94111 Pittsburgh, Pennsylvania 15230 Anthony Z. Roisman, Esq.

Renea Hicks, Esq.

Trial Lawyers for Public Justice Assistant Attorney General 2000 P. Street, NW Environmental Protection Division Suite 611 P. O. Box 12548, Capitol Station Washington, D.C.

20036 Austin, Texas 78711 Nancy E. Wiegers Mrs. Juanita Ellis, President Spiegel & McDiarmed Citizens Association for Sound Energy 1350 New York Avenue, NW 1426 South Polk Washington, D.C.

20005-4798 Dallas, Texas 75224 Ms. Nancy H. Williams CYGNA-101 California Street San Francisco, California 94111 t

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i Texas Utilities Electric Company Comanche Peak Electric Station Units 1 and 2 cc:

Resident Inspector - Comanche Peak I

c/o U.S. Nuclear Regulatory Commission P. O. Box 1029 Granbury, Texas 76048 l

Mr. sonn m. Beck i

Manager - Licensing Texas Utilities Electric Company Skyway Tower l

400 N. Olive Street, LBf81 i

Dallas, Texas 75201

- Mr. Jack Redding l

Licensing Texas Utilities Generating Company

~4901 Fairmont Avenue i

i Bethesda, Maryland 20814 Wilitam A. Burchette. Esq.

Heiusi, Lue ciee6te, Ruckert & Rothwell Suite 700 l

1025 Thomas Jefferson Street, NW Washington, D.C.

20007 Mr. James McGaughy Southern Engineering Company of Georgia i

1800 Peachtree Street, NW Atlanta, Georgia 30367-8301 t

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Dockets Ncs.: 50-445 IEP f 3 58 and 50-446 Mr. W.G. Counsil Executive Vice President Texas Utilities Generating Conpany 400 North Olive Street, L.B. 81 l

Dallas, Texas 75201 4

Dear Mr. Counsil:

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SUBJECT:

INCONSISTENCY IN AMENDMENT 55 0F COMANCHE PEAK FSAR RELATIVE TO PROTECTION OF CONTROL ROOM OPERATORS AGAINST CHLORINERELEASE(SECTION6.4)

The Accident Evaluation Branch has reviewed Amendment 55 to the Comanche Peak 1

FSAR, and finds that there is an inconsistency relative to the protection of control room operators against a chlorine release accident. The air exchange i

rate shown in Table 1 of Regulatory Guide 1.95 is equivalent to the control room pressurization flow rate necessary to maintain an 1/8 inch water gage l

j pressure differential, not the infiltration rate as presumed in Section 6.4~.2.3 of Amendment 55. The significance of this error from a safety 1

standpoint is that the 800 CFM pressurization flow rate. proposed by the utility remains unjustified. The flow rate is about a factor of two higher than the guidance in Regulatory Guide 1.95 for the protection of operators following a design basis chlorine release.

We have discussed our concerns on this problem with members of your staff; i.e. R. Dacko, et al. My staff will also arrange any conference calls or j

meetings needed to resolve this issue. Please advise my staff of your schedule.

i.

Sincerely, i

i 1

Vincent S. Noonan, Director Comanche Peak Project i

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