ML17309A146

Forwards Summary of Listing of Motor Operated Valve Performance in Response to Re SEP Topic III-10.A. Summary Comprised of Data from Plant Maint Records & Covers Time Period from 1972 to Present

ML17309A146
Person / Time
Site:	Ginna
Issue date:	04/22/1981
From:	Maier J ROCHESTER GAS & ELECTRIC CORP.
To:	Crutchfield D Office of Nuclear Reactor Regulation
References
TASK-03-10.A, TASK-3-10.A, TASK-RR NUDOCS 8104280398
Download: ML17309A146 (7)

Text

REGUI ATOf INFORMATION DISTRIBUTION TEM (RIDS)

ACCESSION NBR:8104280398 DOC ~ DATE: 81/04/22 NOTARIZED'O FACILt:50-. 244 Robert Emmet>> Ginna Nuclear PlantE Uni,t fr Rochester G

AUTH:,NAME" AUTHOR AFFILIATION MAIER~J ~ E, Rochester Gas

& Electric Cor p.

RECIP h<AME RECIPIENT AFFILIATION CRUTCHF IELIIE D ~

Operating., Reactors Branch 5

SUBJECT:

- Forwards summary of listing of motor operated valve per formance in response to 810318 1 tr r e 8EP Topic III.10 ~ A Summary comprised of, data from plant maint records

& covers time period from 1972 to present, DISTRISUTI N

CODE:

AOSSS COPIES RECEIVED:LTR g'ENCL g'IZE:

Q'ITLE; SEP Topics" NOTES: 1 copy:SEP Sects Ldr ~

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ROCHESTER GAS lgiCVORPORATlON D

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VICE PRESIDENT gg( LI[tj PPR 2V >98

~~V ERCSSPSA1 u.S. ~~~K' Director of Nuclei'r.PR'ehctor Regulation Mr. Dennis M. Crutchfield, Chief Operating Reactors Branch No.

5 Division of Licensing U.S. Nuclear Regulatory Commission Washington, D.C.

20555

Subject:

SEP Topic III-10.A, Thermal Overload Protection for Motor-Operated Valves R.

E. Ginna Nuclear Power Plant Docket No. 50-244

Dear Mr. Crutchfield:

This letter is in response to your letter dated March 18, 1981 (received March 23, 1981) relative to this SEP topic.

As re-

quested, we have included a summary of the listing of motor operated valve performance at Ginna.

The summary is comprised of data from Ginna maintenance records of 102 motor operated

valves, and covers a time period of about nine years (1972 to the present).

Also attached is a typical Ginna safeguards MOV elementary wiring diagram.

As can be seen, limit switches and torque switches are used in parallel in both the opening and closing circuits of 'these valves.

In the open circuit, a bc limit switch (closed only when the valve is closed) bypasses the torque switch.

In the close circuit, an ao limit switch (closed only when valve is fully open) bypasses the torque switch.

These bypasses allow for a higher breakaway torque than the normal running torque.

This arrangement appears to meet the criteria stated in the second paragraph of your March 18, 1981 letter.

We trust this information is responsive to your needs.

Very truly yours, Jo n E. Maier Attachment

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COMP ONE NT P ROBLEM EFFECT NO.

OF OCCUR ~

Torque Switch as found setting not at desired value.

None - Valve Operated properly 13 Torque Switch torque switch opening prior to valve reaching its full travel valve did not obtain full close position Torque Switch Faulty torque switch valve would not operate electrically Torque Switch and Limit Switch Grease or oil on contacts Valve would not operate electrically Limit Switch as found setting not at the proper position valve operated properly open or close status light not indicating the true valve position Contactor "A"

Switch faulty control switch had to be held to open pos ition unt i 1 valve was fully open.

Auto matic open circuit unaffected Bearing retaining ring slipped out of p os ition and rode on be ar ing v alve would no t operate electrically Manual trip Lever motor would not trip lever out of manual mo t or wou ld not engage Motor faulty valve would not operate electrically Control Power Fuse blown valve would not operate electrically

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v' operators. Thus 20BLO is the opening con:actor of a block valve.

Nore 4: In a system involving a number of valves. the individual valves may be designated by suffixnun:bars.

as provided in 2-9.5. thus: 20.t. 20-2. 20.3. clc. For each such valve the applicadon should be shown in a devroe number !able and the location in the piping sys;em should be shown in an elementary piping diagram.

Apparatus Thermal Device The apparatus to which the thermal device is applied may be identified as follows:

26PC pump case over-temperature device.

Position Switch To indicate a Line Scraper Passage Signal Device this designation may be supple-mented as follows:

33SS-Scraper Passage Signal Device 33SA-Arriving Scraper Signal Device 33SD Departing Scraper Signal Device 33SR Received Scraper Signal Device Examples:

20BE dosignates, on a block valve, an ac auxiliary switch,'pen only when.

the valve is fully closed 20S designates, on a suction valve, an tc auxiliary switch. torque-opened to stop the valve closing 2QO designates, on a discharge valve, an a10%

auxiliary switch, open except when the valve is 10%, or more, open Note t: On diagrams containing the foregoing auxiliary switch designations, operation should be cnarled as follows:

(5) Device Function 38:

Bearing Protective Device The protected bearing may be identi(ied'as follows:

38M1 Motor bearing, inboard 38M2-Motor bearing, outboard 38P1 - Pump bearing, inboard 38P2 Pump bearing, outboard 38C1 -Compressor bearing, inboard 38C2 - Compressor bearing, outboard 38L1 -Gear bearing, low speed, inboard 38L2 Gear bearing, low speed. outboard Valve Position Auxiliary Switch Closed 38H1 Gear bearing. high speed, inboard 38H2 Gear bearing, high speed, outboard Nore: Where more than two bearings are employed in the axial line. they are numbered consecutively from the inboard. or drive. end.

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(6) Device Function 39:

Mechanical Condition Monitor Specific types are designated by suffix as follows:

39VB Vibration monitor 39SF Seal failure monitor (7) Device Function 45:

Atmosphero Condition Monitor Specific types are designated by. suffix as follows:

45HA-Explosive atmosphoro monitor 45SM - Smoke monitor 4)FR' Fire monitor Note:

c csignadons ol auxgiary swhches on SOle-nold valves are as svr fonh in 2.9.4.4.2. Thc word "solenoid" shall be inserted ahead ol mo word "valves" ln the third linc of that paragraph.

Nolo 3: In confonnily vvhh 2 9.4.I, sulfixcs 0 ond C (capital loners) shall bc used ro designate lho opening and closing conlaclOrS ConuOlhng molcdzcd valve Pipeline Pump Stations Proposed Device Numbers and Functions, Continued (For trial use as supplement of American Standard C37.2.)

(2) Device Function 20, continued (b) The following suffixes may be used to indicate the operation of mechanically-actuated auxiliary switches on valves. These shall be lower-case {small) letters in accord-ance with 2-9.4.4.2 and ordinarily shall be written directly below the device number as provided in 2-9.4.

ac open only when valve is fully closed (3)

Device Function 26:

ao open except when valve is fully open bc - closed only when valve is fully closed bo-closed except when valve is fully open tc -opened by torque-responsive mecha-nism, to stop valve closing to -opened by torque-responsive mocha-(4) Device Function 33:

nism to stop valvo opening Letter a (or b) may be followed by a numer-ical suffix to designate that the contacts are open (or closed) through the indicated percentage traverse of the valve from its

'losed position.

(8) Device Function 63:

Pressure Switch The following designations may be used for specific applications:

63S

- Switch responsive to suction pres-sure 630

-Switch responsive to discharge pressure 63PC -Switch responsive to pump case pressure 63PT -Switch responsive to pressure on pump side of station control valve 63J Switch responsive to differential pressure 63JP

-Switch responsive to pump differ-ential pressure 63JTT-Switch responsive to differential pressure across station control valve 63JST-Switch responsive to differential pressure across strainer 63JF1-SIlvitch responsive to differential pressure across filter 63JR -Switch responsive to differential air pressure between two rooms 63AR -Switch responsive to pressure of room vontilation air 63AM Switch responsive 'to pressure of air delivered to force-ventilated motor 63LO -Switch responsive to pressure of lubricating oil 63SO -Switch responsive to pressure of seal oil 63W Switch responsive to pressuro of water 63AI Switch responsive to pressure of instrument air (9) Device Function 71:

Lovel Switch 71SB -Switch responsive to level in scrubber 71SO -Switch responsive to level in soal oil tank 71ST - Switch responsive to level in stock or storage tank 71SU -Switch responsive to level in sta-tion sump (10) Device Function 80:

Flow Switch SOAR -Switch lesponsive to flow or room ventilation air 80AM Switch responsive to flow of air to force ventilated motor 80LO Switch responsive to flow of lubri-cating oil 80SO -Switch responsive to flow of seal oil 80W Switch responsive to flow of water