ML19338F264
| ML19338F264 | |
| Person / Time | |
|---|---|
| Site: | Dresden, Quad Cities  |
| Issue date: | 08/09/1973 |
| From: | Ziemann D US ATOMIC ENERGY COMMISSION (AEC) |
| To: | Brian Lee COMMONWEALTH EDISON CO. |
| References | |
| TASK-06-06, TASK-RR NUDOCS 8010140662 | |
| Download: ML19338F264 (3) | |
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AUG 9 1973 Jocket Nos. 50-10, 50-237, 50-249, 50-254, and 50-265 Commonwealth Edison Company ATIN:
Er. Byron Lee, Jr.
Vice President Post Office Box 767 Chicago, T114nois 60690 Gentleuea.
Your letter dated July 13, 1973, expressed concern regarding the capability of Quad-Cities Units 1 and 2 and Dresden Units 1, 2, and 3 to meet the Commission's new Appendix J to 10 CFR Part 50, effective March 16, 1973.
In reviewing your request for consideration of the applicability of the Appendix J to Quad-Cities Units 1 and 2 and Dresden Units 2 and 3, we find additional information, itemized below; is needed to com-plete our evaluation.
1.
Submit the Dresden 2/3 and Quad-Cities 1/2 Integrated Pri=ary Contain - t Leak Test (IPCLT) Program for our review and evalua-tion.
Tnebute the following information:
a.
The degree to which test methods follow ANSI N45.4-1972.
b.
A description of the test methods used to detect penetration, and isolation valve leakages. In the case of Dresden 2/3, list all the penetrations.
A description of the test data reduction methods, including c.
the use of a least squares fit, of an upper bound 95; confidence limit, and how instrument errors are necounted for.
2.
The Dresden 2/3 (D 2/3) Technical Specifications (TS) and the Quad-Cities 1/2 (QC 1/2) TS state that only personnel airlock door seals shall be tested. The bases for the D 2/3 TS indicate 1
8010140 [62
Co=momrealth Edison Company AUf3 3 g3 tilat the innea door could not withstand accident prescure, even with an auxiliary stiffening structure such'as a "strongback",
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in the reverse direction. QC 1/2 TS do not discuss chis in its bases. Provide the pressure that the air locks would be capable of safely withstanding using a device auch as a strongback on the inner door. The TS for all four plants permit the inner door to be open during operation, thus the outer door and air-lock would become part of the containmant boundary in the unlikely event of an as.xident, yet the outer door and airlock do not receive accident pressure testing. Propose a test procedure for the con:plete airlock.
3.
The main steam isolation valves (MSIV) for all four units are presently leak tested using TS 4.7.A.2.h(1) at 25 psig by pressurizing between the two MSIV in the same steam line. The inboard valve is being tested in the reverse direction at less than accident pressure and the outboard valve is tested in the flow direction but at less than accident pressure. The bases section of TS 4.7 does not provide the justification for this test pressure. Provide the basis for the MSIV test pressure and procedure.
4.
The manwilly operated isolation valves on the instrument lines carrying primary system fluid, which are normally open, need not be leak tested if the instrument lines meet all the following criteria:
a.
The valves are not required for an isolation function in the event of a LOCA.
b.
The fluid carrying portion of the system recninc within the primary or secondary containments.
c.
The transducers or gauges at the fluid carrying terminations of the instrument lines would retain leak tight integrity even in the unlikely event of a DBA while eg eriencing the resaltant accident conditions of pressure, te=pcrcture, cnd flow velocity.
Describe the design of the fluid carrying instruncnt lines indicating that the lines either meet the three criteria providea above or provide a leak test program for the valves on the lines that perform an isolation function.
POOR ORMINAL
D 3-Co:=envaalth I41 son Conpany nuet..
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Oc cl., va infer =tica ic requested within 30 days of the d:tt of thin letter and chould be sub=itted as one signed original and thirty-ninc adiitional copics.
nc Dresden 1 contain= cat leak rate test program vill be addressed in i separate letter.
Sincerely, Origirral signed by Dennis L ziemann Dennis L. Zicmann, Chief Operatin: Reactors Branch 52 Directorate of Licensin;;
cc:
Mr. Charles Whitnere President and Chairman Dis tr_i_bution Iowa-Illinois Gas and Docket Files T.lectric Cc=pany AEC PDRs 106 East Second Avenue Local PDRs Davenport, Iowa 52801 RP Reading Branch Reading Jc'.n.n U. Rowe, Esquire JRBuchanan, ORNL Isha=, Lincoln & Eeale DJSkovholt, L:0R Counselors at Law TJCarter, L:0R One First Kational Plaza ACRS (16)
Chicago, Illinois 60670 R0 (3)
OGC Morris Public Library SPawlicki, L:!IB RFdiaccary, L:E Moline Public Library DLZie= ann, L:0RB #2 JIRiesland, L:0RB #2 RMDiggs, L:0RB #2 PER ORIGINAL
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