ML20111C396

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Requests Rev to Draft Tech Specs,Changing Table 3.8.4.2-1 Re Atmosphere Control Drywell & Suppression Chamber Hydrogen Recombiner Sys to Correct Error in Table Identified During Preparation of Surveillance Procedures
ML20111C396
Person / Time
Site: Fermi DTE Energy icon.png
Issue date: 03/12/1985
From: Jens W
DETROIT EDISON CO.
To: Youngblood B
Office of Nuclear Reactor Regulation
References
NE-85-0458, NE-85-458, NUDOCS 8503150385
Download: ML20111C396 (5)


Text

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Necr Owams j Fermi-2 Edison !KEKF88 sa,ch ,2, ,985 e.v ,

NE-85-0458 i

Director of Nuclear Reactor Regulation Attention: Mr. B. J. Youngblood, Chief Licensing Branch No. 1 Division of Licensing

, U. S. Nuclear Regulatory Commission Washington, D.C. 20555

Dear Mr. Youngblood:

Reference:

Fermi 2 NRC Docket No. 50-341

Subject:

Request Change to Draft Fermi 2 Technical Specifications Please revise the draft Fermi 2 Technical Specifications as indicated on the attachment.

During preparation of surveillance procedures for the existing technical specification on hydrogen recom-biners, a determination was made that surveillance re-quirement 4.6.6.1.a required clarification regarding the location where temperature would be measured. In addi-tion it was determined that a more meaningful test would be to measure the heater outlet gas temperature as currently required at several other recently licensed

  • BWR plants. The heater outlet gas temperature is more representative of the reaction chamber gas temperature which is the parameter that is automatically controlled to ensure recombination. Based upon functional tests performed by the vendor on similar units, the heater outlet gas temperature should exceed 1150*F within 75 minutes. Stable operation of the heater control sys-tem can be determined by ensuring that the heater out-let gas temperature is maintained greater than or equal to 1150*F for one hour.

The proposed change to Table.3.8.4.2-1 corrects an error in the Table determined during the preparation of sur-veillance procedures.

I hereby certify that these proposed changes reflect the plant, Final Safety Analysis Report and the staff's Safety Evaluation Reports in all material respects.

8503150385 850312 PDR ADOCK 05000341 A PDR

l Mr. B.-J. Youngblood March 12, 1985 NE-85-0458 Page 2

- Please direct any questions to Mr. O. K. Earle at (313) 586-4211.

Sincerely, Attachment cc: Mr. D. S. Brinkman Mr. P. M. Byron.

Mr. M. D. Lynch USNRC Document Control Desk Washington, D.C. 20555 4

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I, WAYNE H. JENS, do hereby affirm that the foregoing statements are based on facts and circumstances which are true and accurate to the best of my knowledge and belief.

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WAYNE H. JENS +

Vice President Nuclear Operations On this day of , 1985, before me personally appeared Wayne H. Jens, being first duly sworn and says that he executed the foregoing as his free act and deed.

h/A4tb & k Notary Public

. , .:, a N0tzry Pub.ic, Wmic.asvt County, MI My Comm!ssion Ep?ics Dec.23,1987 Ab FAN

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CONTAINMENT SYSTEMS

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  • " -' d e 3/4.6.6 PRIMARY' CONTAINMENT ATMOSPHERE CONTROL .

! DRYWELL AND SUPPRESSION CHAMBER HYDROGEN RECOMBINER SYSTEMS LIMITING CONDITION FOR OPERATION 3.6.6.1 Two independent drywell and suppression chamber hydrogen recombiner systems shall be OPERABLE.

APPLICABILITY: OPERATIONAL CONDITIONS 1 and 2.

ACTION: With one drywell and/or suppression chamber hydrogen recombiner system inoperable, restore the inoperable system to OPERABLE status within 30 days or be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

SURVEILLANCE REQUIREMENTS 4.6.6.1 Each drywell and suppression chamber hydrogen recombiner system shall be demonstrated OPERABLE: oJtlet gas

a. Atleastonceper6monthsbyverifyingkuringarecombinersystem functional test that the M : = heater sheath temperature increases z "airaeir,; 11SC"I to greater than or equal to 1150*F within 7fi4& minutes a b is maEtoiwed for at least { hourf.

At least once per 18 months by:

b.

1. Performing a CHANNEL CALIBRATION of all recombiner operating
  • instrumentation and control circuits.
2. Verifying the integrity of all heater electrical circuits by

> per. forming a resistance to ground test within 60 minutes following the above required functional test. The resistance to ground for any heater phase shall be greater than or equal to 10,000 ohms.

3. Verifying through a visual examination that there is no evidence of abnormal conditions within the recombiner enclosure; i.e, loose wiring or structural connections, deposits of foreign materials, etc.
c. By measuring the system leakage rate as a part of the overall inte-grated leakage rate test required by Specification 3.6.1.2.

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FERMI - UNIT 2 3/4 6-57

TABLE 3.8.4.2-1 (Continu d) FINAL Dg PRIMARY CONTAINMENT PENETRATION CONDUCTOR OVERCURRENT PROTECTIVE DEVICES A

RESPONSE

! DEVICE NUMBER AND TRIP OR FUSE TIME SYSTEMS / COMPONENTS LOCATION TYPE SOURCE ms/ cycle RATING (A) POWERED E 72F-4A-2MR) Bussmann 72F-4A-2A(R) 15 A N.A. T4700-C004 drywell Z (fuse box R1600S005G) (FRN) cooling fan 4 motor u winding heater

  • 3oA fuse Mock Bossman ,

15A circuit br;; L.- Squer; O Dist. Pnl. 15 A N.A. T4700-C001 and -C002 (single pole) H21-P553 cooling fans 1 and 2 (H2l- P32?/0 (NQOBt CFRN )Ckt. #13 vibr. sw. reset coils 30A fuse block Bussmann Dist. Pn1. 5A N.A. T4700-C001 and -C002 (single pole) (FRN) H21-P553 cooling fans 1 and 2 Ckt. #13 vibr. sw. reset coils Jo A fuse Moch. Bossmom 15e c! reft ir: 9:r S;;;cm -iT Dist. Pnl. 15 A N.A.

(single pole) T4700-C003 and -C004 R8 fNQ98-)- H21-P555 cooling fans 3 and 4

  • (FRN, (H21-P.32.t B) LKt. #16 vibr. sw. reset coils m

30A fuse block Bussmann Dist. Pnl. 5A N.A. T4700-C003 and -C004 (single pole) (FRN) H21-P555 cooling fans 3 and 4 Ckt. #16 vibr. sw. reset coils

5. 130V dc -

4.16 kV switchgear Bussmann 130V dc 15 A N.A.

Bus 65G, Position G3 B3100-5001A MG Set A (FRN) at swgr. (3 fuses) drive motor control Bus 65G circuit 4.16kV switchgear Bussmann 130v dc 15 A N.A.

Bus 65G, Position GS B3100-50018 MG Set B (FRN) at swgr. (3 fuses) drive motor control Bus 65G 480 V switchgear Bussmann 130V dc 15 A N.A.

Bus 72F, Position 2C G3303-C001A reactor (FRN) at swgr. (3 fuses) water clean-up system Bus 72F recirculating Pump "A" drive motor control circuit 480V switchgear Bussmann 130V dc at 15 A N.A.

Bus 72E, Position 2D G3303-C001B reactor (FRN) swgr. Bus 72E (3 fuses) water clean-up system circulating pump "B" drive motor control

. circuit

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