ML20037B427
| ML20037B427 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 08/14/1973 |
| From: | Ziemann D US ATOMIC ENERGY COMMISSION (AEC) |
| To: | Abel J COMMONWEALTH EDISON CO. |
| References | |
| NUDOCS 8009260710 | |
| Download: ML20037B427 (3) | |
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Distribution Docket File AEC PDR I 5 1973 RP Reading Branch Reading JRBucucuan, ORhl a cket ho. 50-10 DJSkovholt, L:0R TJCarter, L:0R ACRS (16)
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OcC Coramonaealth Edison Co=pany EPJiaccary, L:E ATTN:
Mr. J. S. Abel SPawlicki, L:MEB Nuclear Licensing W eintrator -
DLZienann, L:0RB #2 Boiling Water Reactors RDSilver, L:0RB #2 Post Office Box 767 RMDiggs, L:0RB'#2 Chicago, Illir:nis 60690 s
G cn le-t.m :
Your letter of July 13, 1973, requested consideration of the applicability of certain requirements of 10 CFR Part 50, Appendix J to the Dresden and Quad-Cities reactors. A separate letter dated August 9, 1973, was sent to you regarding Dresdens 2 and 3 and Quad-Cities 1 and 2.
To continue our evaluation of your request for Dresden 1, you are requested to subnit the additional infornation identified in the enclosure within 30 days of the date of this letter.
The infornation should be subnitted with one signed original and 39 additional copies.
Sincerely,
Dermir: L. Zien:nn, Chief Operating Reactors Eranch f 2 Directorate of Licensing
Enclosure:
Rcqt:est for Additional Infor::.ation cc v/caclosure:
John W. Rowe, Esquire 1shan, Lincoln & Beale l
Counselors at Law One First National Plaza l
Chicago, Illinois 60670 O
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D0CKET UO. 50-10 REQUEST TOR ADDITIONAL IKFOPEATIO;;
1.
Sub=it the Dresden Unit 1 Integrated Primary Containment Inak Test (IPCLT) Progran for our review and evaluation.
Include the follcr. ring information:
n.
l.ccu ancc thct test methods follow /2;SI U45.4-1972.
b.
Verification of the test accuracy by a supplemer.tal test such as that described in Appendix C of /SSI E45.4-1972.
A description of the test methods used to detect penetration, c.
hatch, air lock, supply and exhaust ventilation valve, and isolation valve leakages.
d.
A description of the data reduction methods, including the use cf c least squares fit, or an upper bound 951 ccifidence licit, and of inclusion of instrment errors.
A description of contain:sent co::ponents, if any, uhich in the e.
past contributed to the failure of necting the contciument leakage limits.
f.
A sumary of all the previous IPCLT and local leak rate test data.
2.
In regard to Section 4.7.A.l.d. of the proposed Technical Specif1-cations subcitted by letter dated May 17, 1973, describe the pro-cadurcs and calculational models used to fcctor in the diurnal tc=perature cycle for the 24-hour integrated Icak rcte ccesure e -t.
Discuss the effectiveness of the contain ent insulation in pre-venting heat flo, betvcen the contn4-nt and outside atnosphere.
3.
Confir our understanding that you vill nodify proposed technical specification 4.7.A.l.e(2) to a mirimum allowable operational leak rate of 0.75 Lp.
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- nticcte if an; cf the conpencats listed 1n prepoced epccificatien s.7.1,.1.i(2) have a double gasketed desi;;n which could be tested by
, reasuric:. tion to 20 pcig at each closure.
5.
T.clate the acceptance limits of proposed specification i. 7.i.l.j.
- o L rather than L,. L ray vary from test to te s t. h follc.-in; lini$s are recot:acncSd:
kS)0.05L for double gasketed ceals, and P
(2) 0.60 L for the sum of testable penetration and isolation valve Aealmges. P
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