ML17334A384

Forwards Addl Info Re NUREG-0737 Items II.F.1.4,II.F.1.5 & II.F.1.6 Re Containment Pressure,Water Level & Hydrogen Monitors Respectively,In Response to 820316 Request

ML17334A384
Person / Time
Site:	Cook
Issue date:	04/29/1982
From:	Hering R INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	Harold Denton Office of Nuclear Reactor Regulation
References
RTR-NUREG-0737, RTR-NUREG-737, TASK-2.F.1, TASK-TM AEP:NRC:0677, AEP:NRC:677, NUDOCS 8205060368
Download: ML17334A384 (13)

Text

ACCES REGULATURY INruRMATION DISTRIBUTION SYSTE, (RIOS)

SION NBR'. 8205060368 DOC ~ DATE: 82/04/29 NOTARiZED:

NO DOCKET FACIL:50"315 Donald C.'Cook Nuclear Power Pl anti Unit 1> Indiana It 05000315 50-316 Dona,ld C.'Cook Nuclear Power Planti Unit 2i Inoiana AUTH'AME AUTHOR AFFILIATION HERINGiR ~ F o Indiana 8 Michigan Electric Co, REC IP. NAME RECIPIKNf AFFILIATION DENTONgH ~ RE Office of Nuclear Reactor Regulationg Director SUBJFCT:

Forwards addi info re NUREG-0737 Items IFFY II.F.1.6 re containment pressureiwater level monitors respectively~in response to 820316 DISTRIBUTION CODE:

A04oS COPIES RECEIVED:LTR ENCL TITLE: Response to NUREG 0737/NUREG-0660 TMI Action ie4iII~ Fele5 hydrogen recupst

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1 and 2

Docket Nos.

50-315 and 50-316 License Nos.

DPR-58 and DPR-74 REQUEST FOR<<ADDITIONAL INFORMATION ON TMI ACTION ITEMS II.F.1.4, 5 and 6

Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, D. C. 20555

Dear Mr. Denton:

The Attachment to this letter responds to Mr. S. Varga's request of March 16, 1982 for additional information on TMI Action Items II.F.1.4, Containment Pressure Monitor, II.F.1.5, Containment Water Level Monitor, and II.F.1.6, Containment Hydrogen Monitor.

This document has been prepared following Corporate procedures which incorporate a reasonable set of controls to insure its accuracy and completeness prior to signature by the undersigned.

RSH/os Very truly yours, fK~

R. F. Hering Vice President cc:

John E. Dolan Columbus R.

W. Jurgensen W. G. Smith, Jr. - Bridgman R. C. Callen G. Charnoff Joe Williams, Jr.

NRC Resident Inspector at Cook Plant - Bridgman 8205060368 820429 PDR ADOCK 05000315 P

PDR

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Attachment to AEP:NRC:0677 Our response follows the same format given in Enclosure 1 to iir. S. Varga's letter of iNarch 16, 1982.

Ql.,

In the submittals received to date you have not indicated that you plan to take exception to any of the requirements of NUREG-0737.

Are you planning any exceptions of which we are not aware' AI.

Subject to the successful completion of various equipment qualification tests currently being performed, we believe that we meet the requirements of NUREG-0737 on items II.F.1.4 (Containment Pressure Monitor), II.F.1.5.

(Containment Water Level Monitor) and II.F.1.6 (Containment Hydrogen Monitor).

Q2.

(II.F.1.4)

What is the accuracy of your pressure monitor?

State this for both the indicator and the recorder.

Since the signals from the containment pressure sensors are indicated and/or recorded on several different devices this response reflects the accuracy of the instrument loop with

'he greatest deviation.

The accuracy for the indicator is

+3.35% with the recorder accuracy being +3.08%.

The accuracies for all these responses are based on methodology presented in Westinghouse Reactor Protection System/Engineered Safety Features Actuation System Setpoint Methodology NS-TMA-1835.

The percentages were developed using generic manufacturers literature.

Q3.

(II.F.1.4)

What is the time response of your pressure monitor?

State this for both the'indicator and the recorder.

A3.

The time response for the containment pressure indicator is something less than 4 seconds full scale.

The time response for the recorder is 1.6 seconds full scale.

This response considers the readout device only since the transmitter is direct process connected with essentially no time lag.

Q4.

(II.F.1.5)

What is the accuracy of your water level monitor?

State this for both 'the wide range instrument and the narrow range instrument.

A4.

The accuracy of the containment water level monitor is +3.35% for both the wide and narrow range instruments.

Q5.

A5.

(II.F.1.6)

Where are the hydrogen sample ports placed?

There are nine (9) locations within the containment building, seven (7) in the upper compartment and two (2) in the lower compartment.

These provide representative sampling of the containment atmosphere for hydrogen following a loss of coolant accident.

The location of each area sampled is noted in the attached Figures 1,

2 and 3.

The hydrogen sample locations (ports) are identified as ESR-1 to ESR-9 and are located at:

Sample No./

Com artment Location Approx.

Elevation (Ft.)

ESR-1(U)

, Steam Generator No.

4 Outside Enclosure Wall

.692 ESR-2(U)

ESR-3(L)

ESR-4(L)

ESR-5(U)

ESR-6(U)

ESR-7(U)

East Recombiner Outlet Lower Containment East Lower Containment West Containment Dome East Containment Dome West Steam Generator No.

3 Outside Enclosure Wall 705 645 645 743 743 692 ESR-8(U)

ESR-9(U)

West Recombiner Outlet Top of Containment Dome Center 705 767 (U) - Upper Containment Compartment (L) - Lower Containment Compartment Q6.

(II.F.1.6)

Is there any obstruction which would prevent hydrogen from the core reaching the hydrogen sample ports reasonably quickly?

A.6 Following a

loss of coolant accident (LOCA),

hydrogen generated within the core should reach the hydrogen sample ports reasonably quickly since there are no ma)or obstructions to prevent flow to the sample ports.

- During a LOCA air from the lower compartment of the containment will be directed through the ice condenser to the upper compartment.

During post LOCA conditions, the Containment Recirculation/Hydrogen Skimmer System provides recirculation of the containment air between the upper and lower compartments and

,prevents the improbable pocketing of hydrogen within the containment building.

The system provides a forced recirculation pattern from the upper to the, lower compartment as shown in the Cook Plant FSAR

(Figure 5.5-3) and aids in mixing of the containment air and in transporting air to a sampling port.

Q7.

(II.F.1.6) 'hat is the accuracy of your hydrogen monitor?

A7.

The accuracy of the hydrogen monitor is +4.05%.

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