B11916, Provides Supplemental Relief Request Info Re Inservice Insp & Testing Program.Main Feed Sys Check Valves 2-FW-5A & 2-FW-5B Cannot Be Tested Per ASME Boiler & Pressure Vessel Code.Periodic Valve Disassembly Suggested

Provides Supplemental Relief Request Info Re Inservice Insp & Testing Program.Main Feed Sys Check Valves 2-FW-5A & 2-FW-5B Cannot Be Tested Per ASME Boiler & Pressure Vessel Code.Periodic Valve Disassembly Suggested

ML20138R257
Person / Time
Site:	Millstone
Issue date:	12/16/1985
From:	Opeka J NORTHEAST NUCLEAR ENERGY CO., NORTHEAST UTILITIES
To:	Thadani A Office of Nuclear Reactor Regulation
References
B11916, NUDOCS 8512310128
Download: ML20138R257 (4)

Text

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NORTHEAST UTILITIES cenero Omce. . semen si,eet. B.,i n. connect, cut M.

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sEC [ P O BOX 270 HARTFORD. CONNECTICUT 06141-0270 k k J $2U[ , $'.". (203) 665-5000 December 16, 1985 Docket No. 50-336 B 11916 Director of Nuclear Reactor Regulation Attn: Mr. Ashok C. Thadani PWR Project Directorate No. S U. S. Nuclear Regulatory Commission Washington, D. C. 20555

References:

(1) 3. F. Opeka letter to E. J. Butcher, dated June 27, 1985.

(2) 3. F. Opeka letter to E. J. Butcher, dated August 30, 1985.

Gentlamen:

Millstone Nuclear Power Station, Unit No. 2 Inservice Inspection and Testing Program Supplemental Relief Request Information In References (1) and (2) Northeast Nuclear Energy Company submitted the Inservice Inspection Program and associated relief requests for the second ten-year inspection interval of Millstone Unit 2. Since that submittal, operating experience has identified the need for additional relief from inservice testing requirements for two valves, pursuant to 10CFR50.55a(g).

Valve 2-FW-5A and 2-FW-5B, the Main Feed System check valves at the i

containment penetration, cannot be tested in accordance with the ASME Boiler and Pressure Vessel Code, Section 11 requirements. In addition to operational interference with testing requirements previously identified in Reference (1), it has recently been identified that the valve obturator is not attached to the valve operator. Thus the alternative testing specified in Reference (1) does not provide assurance that the valve obturator will close promptly on cessation or reversal of flow. There is no means of testing the valves that will meet the ASME Code requirements. The attached, supplemental relief request recognizes this and identifies that, in addition to valve operator testing, valve obturator freedom of movement will be verified by periodic valve disassembly.

Pursuant to the requirements of 10 CFR 170.12(c), enclosed is the application fee of $150.00. We trust you will find this information satisfactory.

8512310128 851216 Very truly yours, PDR ADOCK 05000336 0

NORTHEAST NUCLEAR ENERGY COMPANY y m _ n/sc . recH sw m T AD - D. cRUTCHFIEI.D (Ltr only)

E9 (w. JOHNSTON) / 1 RSS (THOMAS) /r EICSB (PARR)

• '"' ** FOSa O Senior Vice President R a w o 4> A##

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.- 3 Date: Noveaber 29, 1985 Revision: 1 RELIEF REQUEST BASIS SYSTEM: FEEDWATER

1. Valve: 2-FW-5A, 5B Category: BC Class: 2 .

Function: Prevent backflow in main feedline to No. I steam generator.

l Test Requirement: Exercise (full stroke) for operability.

every three months. Take stroke time measurements per IWV-3410. Test for fail safe operation.

Bas.is for Relief: Valve exercise during plant operation would require stopping feed flow to the steam generator.with consequent plant shutdown.

Valve has no part stroke capability. Valve operator is not connected to obturator.

Obturator cannot be exercised during cold shutdown or refueling.

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Date: November 29, 1985 Revision: 1 Alternate Testing: Exercise valve operator, measure stroke time and fail-safe test during cold shutdown.

Disassemble one valve each inspection period to verify obturator freedom of moven 9t.

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V21v3 Class / Feedwater Size Valve Normal Test Relief Testing

~ Number Category 25203-26126. Sh. 4 Type (Inched Actuation Position Requirements Requests Alternative 2- W-5A 2BC Feedwater to S.C. I 18 stop A0 0 Q X QCS*

CK FT X FTCS*

2- W-5B 2BC Feedwater to S.G. 2 18 STOP A0 0 Q X QCS*

CK FT X FTCS*

2-W-7 3C Steam Aux. pp. Discharge 6 CK -

C Q X , QCS

, 2-Iv-8A 3C Aux, pp. A Discharge 4 CK -

C Q X QCS 2- W-8B 3C ' Aux. pp. 8 Discharge 4 CK -

C Q X QCS F

2-W-12A 2BC Aux. Feedwater to S.C. I 6 STOP A0 .C Q X QCS CK FT X ITCS 4

2- W-12B Aux. Feedwater to S.C. 2

.i 2BC 6 STOP A0 C X

' Q -QCS CK FT X FTCS .

2- N-32A 3C Aux. IV Pump A Recire. Check 1.5 CK -

C Q 2- N-32B 3C Aux. IN Pump B Rectre. Check 1.5 CK -

C Q .

2-W-33 3C Terry Aux. IV Pump Recirc. Check 1.5 CK -

C Q 2-W-43A 3B Aux. W Reg. Valve to Eo. 1 S.C. 4 CL A0 C Q 2-l%-435- 3B Aux. W Reg. Valve to No. 2 S.C. 4 CL A0 C .Q IV-#.4 3B Aux. IV Pump Dis. Cross Tie 6 CA tio C Q 2-N-56A 3B Aux. IV Reg. Valve Bypass 6 CA H C Q 2- N-565 3B Aux. IV Reg! Valve Bypass 6 CA H C Q CDissesemble one valve per period to verify obturator freedom of movement.

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