ML20244C447

Proposed Tech Specs Removing motor-operated Valves OSX063A & OSX063B from Tech Specs 3.8-2a & 3.8-2b

ML20244C447
Person / Time
Site:	Byron
Issue date:	04/07/1989
From:	COMMONWEALTH EDISON CO.
To:
Shared Package
ML20244C344	List: ML20244C341 ML20244C447
References
NUDOCS 8904200219
Download: ML20244C447 (5)

Text

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' ATTACHMENT B

. PROPOSED CHANGES TO APPENDIX A

w TECHNICAL SPECIFICATIONS, OF FACILITY OPERATING LICENSES NPF-37 AND NPF-66 Resised Pagitsi 3/4 8-42 3/4 8-47 t

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L TABLE 3.8-2a (Continued)

.1 MOTOR-0PERATED VALVES THERMAL OVERLOAD l

. w hi PROTECTION DEVICES UNIT 1 (Continued)

VALVE NUMBER FUNCTION-  ;

1 15I8804B SI Pump 1B Suct X-tie from RHR HX-15I8806 .SI Pumps Upstream Suction Isol 1SI8807A SI to Chg PP Suction Crosstie Isol Viv 15I8807B SI.to Chg PP Suction Crosstie Isol.Viv .

1SI8808A Accum. lA Disch. Isol. Valve-1518808B Accum. 1B Disch. Isol; Valve .

1SI8808C. Accum. 1C Dfsch. Isol. Valve 1SI8808D Accum.' 10 Disch. Isol. Valve ISI8809A ,SI RX HX 1A Dsch Line.Dwst Isol V1v l 1SI88098 SI RX HX 1B Dsch Line Dwst Isol Viv i 1SI8811A- SI Cnmt Sump A Outlet Isol Viv I 15188118 'SI Cnmt Sump B Outlet Isol Viv l 1SI8812A SI Rwst to RH Pp 1A Outlet Isol Viv >

ISI8812B SI Rwst to RH Pp 1B Outlet Isol Viv .'

1SI8813 SI Pumps 1A-1B Recirc Line Dwst Isol 15I8814 SI Pump 1A Recirc Line Isol Viv

~15I8835 SI Pumps X-tie Disch Isol Viv 15I8840 SI RHR HX Disch Line Upstrm Cont Pen Is1 Viv .

1SI8821A SI PP 1A Disch Line X-tie Isol Viv

-15I8821B SI Pump 1B Disch Line X-tie Isol Viv 15I8920 SI Pump 1B Recirc Line Isol Viv 1SI8923A ,

SI PP 1A Suction.Isol Viv 15I8923B SI Pump 1B Suct Isol Valve 15I8924 SI Pump 1A Suction X-tie Dwnstrm Isol V1v

'LSX01611 RCFC B&D Sx Supply MOV ,

1SX016A RCFC A&C SX Supply MOV -

ISX027A RCFC A&C Return 1SX0278 RCFC B&D SX Return MOV OSX007 CC HX Outlet V1v ,, g k H r turn V Un t 1 MDCT OSX157A SX M/V Pp OA Supply Fill to MDCT OSX1578 SX M/V Pp OB Supply to MDCT OB MOV OSX158A SX M/V Pp OA Supply Fill to MDCT MOV OSX158B SX M/V Pp OB Supply to MDCT OB MOV OSX162A HDCT OA Bypass to basin MOV OSX162B MDCT OB Bypass to basin MOV BYRON - UNITS 1 & 2 3/4 8-42

TABLE 3.8-2b (Continued)

MOTOR-OPERATED VALVES THERMAL OVERLOAD l' PROTECTION DEVICES UNIT 2 (Continued)

VALVE NUMBER FUNCTION 2SX001A 2A SX Pp Suct Viv MOV 2SX001B 2B SX Pp Suct Viv MOV 2SX004. U-2 SX Supply to U-2 CCW HX MOV 2SX005 2B SX Pp Supply to O CCW HX MOV.

2SX007 CC HX Outlet V1v 2SX010 U-2 Trn A return Viv AB -

2SX011 Trn A Trn B Unit 2 return X-tie Viv AB 2SX033 2A SX Pp Disch X-tie MOV 2SX034 2B SX Pp Disch X-tie MOV I 2SX136 Unit 2 Trn B return Viv AB 2W0006A Chilled wtr coils 2A & 2C Supply Isol viv 2W00068 Chilled wtr coils 2B & 2D Supply Isol viv '

2 WOO 20A Chilled wtr coils 2A & 2C Return Isol viv 2W00208 Chilled wtr coils 28 & 20 Return Isol viv 2W0056A- Chilled Water Cnmt. Isol. Valve 2 WOOS 6B Chilled Water Cnmt. Isol. Valve OSX0Q7 CC HX Outlet Viv 05y353; g y ' - c ._ _ :.. , , , . :~.=""

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OSX157A- SX M/U Pp OA Supply Fill to MDCT OSX1578 SX M/U Pp OB Supply to MDCT OB MOV OSX158A SX M/U Pp OA Supply Fill to MDCT MOV OSX]58B SX M/V pp OB Supply to MDCT 08 MOV y BYRON - UNITS 1 & 2 3/4 8-47 l

• ATTACHMENT C

. 1 EVALUATION OF SIGNIFICANT HAZARDS CONSIDERATIONS l Commonwealth Edison has evaluated this proposed snendment and determined that it j involves no significant hazards consideration. According to 10 CFR 50.92(c), a

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proposed snendment to an operating license involves no significant safety hazards considerations if operation of the facility in accordance with the proposed snendment would not

1. Involve a significant increase in the probability or consequences of an accident previously evaluated; or

2. Create the possibility of a new or different kind of accident from any accident previously evaluated; or

3. Involve a significant reduction in a margin of safety.

The proposed amendment removes motor-operated valves OSX063A and OSX0638 from Technical Specification Tables 3.8-2A and 3.82b. A modification was performed .

which converted the valves from motor-operated valves to manual valves by removing the electrical connections. The valves are maintained locked open and no longer  ;

require thermal overload protection devices and, therefore, do not meet the criteria for inclusion in Specification 3.8.4.2.

The basis for operability of the thermal overload protective devices on motor-operated valves is to ensure that these devices will not prevent safety related valves from performing their function. These valves are the essential service water inlet valves to the control room chillers. These valves were originally designed to isolate essential service water from the chillers if the essential service water temperature was near freezing. It has been determined that this function was not necessary because essential service water temperatures during winter conditions do not decrease to a point requiring chiller isolation.

The modification converted the motor-operated valves to manual locked open valves, thereby, ensuring an essential service water supply to the control room chillers and minimizing the potential of an electrical or mechanical failure interrupting the water supply. Since the valves perform their required function and no longer

! have thermal overload protective devices, the proposed snendment does not involve a significant increase in the probability or consequences of an accident ,

previously evaluated.

The proposed snendment does not create the possibility of a new or dif ferent kind of accident from any accident previously analyzed. The proposed snendment is essentially administrative in nature, removing valves from a Technical Specification table that are no longer applicable. This snendment does not af fect the valves' functional ability to provido essential service water to the control room chillers.

The proposed snendment does not involve a significant reduction in the margin of safety. The change to the Technical Specifications is administrative and does not affect a margin of safety. Converting the valves from motor-operated to manual locked open enhances their reliability to provide essential service water to the control room chillers, since the service water supply path is less susceptible to {

electrical or mechanical failures.

Therefore, based upon the above analysis, Commonwealth Edison concludes that the 3 l

proposed snendment to the Technical Specification does not involve a significant 1 i

hazards consideration.

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ATIACiniENT D

, ENElBONMENTAL ASSESSMENT Commonwealth Edison has evaluated the proposed snendment againrt the criteria for and identification of licensing and regulatory actions requiring environmental assessment in accordance with 10 CFR 51.21. It hss been determined that the proposed change meets the criteria for a categorical exclusion as provided for under 10 CFR 51.22(c)(9). This determination was based on the fact that this change is being proposed as an amendment to a license for a reactor pursuant to 10 CFR 50. The proposed snendment involves a change in a requirement with respect to installation or use of a facility component located within the restricted area.

Specifically, a modification has been performed that changes valves OSXO63A and OSXO63B from motor-operated valves to manual valves. The proposed amendment also involves a change to an inspection or a surveillance requirement. Since the valves are now manual, they no longer meet the criteria for inclusion in Specification 3.8.4.2, Motor-Operated Valves Thermal Overload Protection Devices.

Therefore, removing the valves from the Specification eliminates the need to perform the surveillance requirements. The proposed snendment involves no i significant hazards consideration. Also, there is no significant change in the types or significant increase in the amounts of any effluents that may be released offsite and there is no significant increase in individual or cumulative occupational' radiation exposure.

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