ML20065S199

Forwards FSAR Change Notice 3602 Revising Description of Natural Circulation Testing in Test Abstracts. Natural Circulation Testing Is Confirmatory Issue 7 in Section 1.8 of SER (NUREG-0793).Info Should Close Out Issue

ML20065S199
Person / Time
Site:	Midland
Issue date:	10/12/1982
From:	Jackie Cook CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:	Harold Denton Office of Nuclear Reactor Regulation
References
RTR-NUREG-0793, RTR-NUREG-793 19370, NUDOCS 8211010133
Download: ML20065S199 (6)

Text

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O Consumers Power James W Cook Vice President - Projects, Engineering and Construction General offices: 1945 West Parnell Road, Jackson, Mt 49201 + (517) 788 0453 October 12, 1982 liarold R Denton, Director Office of Nuclear Reactor Regulation Division of Licensing US Nuclear Regulatory Commission Washington, DC 20555 MIDLAND NUCLEAR C0 GENERATION PLANT MIDLAND DOCKET NOS 50-329, 50-330 SAFETY EVALUATION REPORT INFORMATION FILE: 0505.16 SERIAL: 19370

Reference:

J W Cook to !! R Denton, CP Ce Serial 17917, Dated 07-01-82

Enclosure:

Midland FSAR Change Notice 3602, Revised Natural Circulation Test Abstract Natural circulation testing is Confirmatory Issue 7 in Section 1.8 of the Midland Plant SER (NUREG-0793). The enclosure provides the information necessary to close this issue.

At variance with the referenced letter, Consumers Power Company would elect to perform natural circulation training with the Midland training simulator.

Simulator response will be validated against data from the loss of offsite power transient at Crystal River Unit 3 on June 16, 1981. This transient is notable since the plant was maintained in natural circulation for an extended period of time. The response of Crystal River Unit 3 is considered prototypi-cal of Midland or other lowered loop 177 FA B&W nuclear steam supply.

Questions regarding this subject can be directed to James Webb at t

(517) 788-0053.

4%44/A -

JWC/JRW/fms CC RJCook, Midland Resident Inspector Rifernan, US NRC DBMiller, Midland Construction (3)

RWifuston, Washington j oc1082-1344a131 8211010133 821012 PDR ADOCK 05000329 l E PDR

CONSUMERS POWER COMPANY Midland Units 1 and 2 Docket No 50-329, 50-330 Letter Serial 19370 Dated October 12, 1982 At the request of the Commission and 13nrsuant to the Atomic Energy Act of 1954, and the Energy Reorganization Act of 1974, as amended and the Commission's Rules and Regulations thereunder, Ccasumers Power Company submits SCN 3602, Natural Circulation Test Abstract.

CONSUMERS POWER COMPA By JW ok, Vice President Project , Engineering and Construction Sworn and subscribed before me this 25 day of October. 1989

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Notary Publ'ic' F j Jackson County, Michigan My Commission Expires september R.1984 4

l oe1082-1344a131

. QUALITY ASSURANCE PROGRAM SAR CHANGE NOTICE 1.RSAR JOB NO. 7220 602

2. DISCIPLINE / COMPANY 3. o

4. ORIGINATOR 5.DATE

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6. REFERENCED SECTIONS OF SAR lhA.h.22

7. DESCRIPTION OF CHANGE Revise description of natural circulation testing in test abstracts.

8. REFERENCED SPECIFICATIONS OR DRAWINGS II/A

9. JUSTIFICATION Resolves SER Confirmatory Issue #7 Resolves LCP Item 65-800.

10. BECHTEL DISCIPLINE INTERFACE REVIEW: INTERFACING STAFF REVIEW:

O ARCH C PLANTDSN O ARCH O MCCH O CIVIL OPQAE OCML C5 NUCLEAR C CONTROLSYS O STRESS O CONTROL SYSTEM C PLANTDSN O ELEC D OTHER C ELEC O REUABluTY 3 MEDi! NUCLEAR O GEOTECH O STRESS O M&OS O OTHER IIA M J Wylie 3/30/8? J R Wahl

11. REVIEWED BY DATE 12. REVIEWED BY DATE 13. REVIEWED BY DATE (Group Supervisor) (SAR COORDINATOR) (NUCLEAR ENGINEER) 10/10/ 10/10/

D F Lewis 82 E Clyde 82 By Letter /18/

82

14. CONCURRENCE BY DATE 15. APPROVED BY (CPCo) DATE 16. CONCURRENCE BY DATE (PROJECT ENGINEER) (NSSS SUPPLIER)

AA4110473 REV 9 79 M AND

MIDLAND 1&2-FSAR 14A.4.22 NATURAL CIRCUIhTION T(57/uco [W/T Z CW D -

M. Purpose .

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\ o, T verify natural circulation as a means of removin rea r coolant system decay heat.

2. Prerequis s 2.1 Reactor i ritical at a pre ermined power level.

2.2 Instrumentation set to record required data. 43

3. Test Method Test will be per ed in accordance 'th B&W direction provided at a er date via B&W test sp 'fication.

4. Accepta Criteria x N ral circulation w 1 remove core heat in ccordance with the cceptance criteria provided in B&W

'N.N test specification O

REPLACC W/77/ /A/SER7~ j s.

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Revision 43 14A.4-23 4/82

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INSERT 1 1

1. Purpose 1

1.1 Demonstrate the initiation, maintenance, and recovery from the natural circulation mode.

I 1.2 Demonstrate the performance of the auxiliary feedwater level rate control system.

1.3 Demonstrate the RCS can be uniformly borated while in natural circu-lation.

i 1.4 Demonstrate the capability to cooldown the RCS via natural circula-tion using the OTSGs. Determine acceptable cooldown rate in natural circulation.

i 1.5 Demonstrate the performance of the subcooling monitor.

2. Prerequisites  ;

i l 2.1 The startup test program has progressed to the point where a minimum l of 1% rated full power from decay heat is available. ,

j 2.2 Reactor is shutdown and subcritial by at least 1% AK/K.

i 2.3 Four RCPs running.

2.4 OTSG level at low level limit.

1 i

j 2.5 Normal RCS temperature and pressure.

3. Test Method 3.1 As quickly as possible, trip pressurizer heater banks (1-4), reactor coolant pumps, main steam isolation valves, and main feedwater pump.

Isolate letdown. Verify AFW actuates and is raising OTSG levels to natural circulation setpoint. Control RCS pressure with PORV and OTSG pressure with the POAV. Stablize plant in natural circulation.

3.2 Restore equipment to operation with the exception of the reactor coolant pumps and main feedwater pumps.

j 3.3 With the plant in natural circulation (actual decay heat available) a batch addition of boron to increase RCS boron concentration by approximately 200 ppm will be initiated.

3.4 Sampling will continue to verify RCS concentration increase of > 100 ppm and trend is as expected.

f mi1082-1336a131

2 3.5 An RCS cooldown will be initiated using the turbine bypass valves to demonstrate a cooldown in T,yg of at least 100F.

4. Acceptance Criteria 4.1 Natural circulation has been established. Indications of natural circulation are:

a. A stable loop AT with TC near T,, of the OTSGs.

b. A small or negligible difference between incore thermocouple readings and hot leg temperature readings.

c. RCS pressure and pressurizer level stable prior to cooldown.

4.2 Boron has mixed in the RCS to increase the concentration by at least 100 ppm. The RCS concentration is trending as expected toward the calculated equilibrium value.

4.3 RCS T has been reduced approximately 100F by natural circulation coold$w$ with no void formation in the RCS.

4.4 AFW level rate control prevents overcooling (T < 525F) as predicted. av8 l

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