ML19220B772
| ML19220B772 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 03/26/1969 |
| From: | Racquel Powell US ATOMIC ENERGY COMMISSION (AEC) |
| To: | Boyd R US ATOMIC ENERGY COMMISSION (AEC) |
| References | |
| NUDOCS 7904270333 | |
| Download: ML19220B772 (3) | |
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UNITED 57nE3
.a ATON1tC ENERGY CON 1N11S51CN i-'
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March 26, 1969 Roger S. Icyd, Assistant Direc cr for Reactor Proje::s, DRL g,
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R. 1. Tedesco, Chief, React:r Praj act 3 ranch 2, DEL f
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A seeting was held with representatives of Jersey Central ?cwer s Light Cc=pany (JCPL) on March 14, 1969 in Bethesda. The purpose of the meeting was to discuss the proposed reactor building surveillance pro-gra to detec: deterioration of the design capability to withstand the design basis accident fer the Three Mile Island Unit 2.
The meeting attendance list is attached.
The following natters were discussed.
Reactor Buildin: ?rcof Test JC?L will submit in Arend:en: No. 7 a proposed pregra to pressurice the reactor building to 69 psig during the 2nd,10th and 20th year of opera:1on to provide a demonstraticn of the centinued integrity of the structure.
These 69 psig proof tests of the reactor building will be perforced in the same manner as the initial pressure tes: at 69 psig described in Appendix 5? of the PSAR.
It was indica:ed that the ini:ial pressure test would probably be perfor ed approxicately one year after the stressing of the grouted tendens.
Burns & Roe, the ALE, indicated that as a result of its la:est reactor building structural analysis the number of tendons have been increased frca 383 to 500 to =aintain all concrete in the building walls and doce in cc pression and reduce cracking :hrcughou: the less-cf-ccolan:
accident. As a result of this increase of the prestress forces, no cracking of the cu:er concrete surfaces of the reactor building xalls and deze (except perhaps at discontinuities) shculd occur at the 69 psig pressure :ests.
The purpose of the 69 psig proof test is to detect changes in the reactor building physical di=ensions and crack patterns which would indicate a faterioration of the capabili:7 cf the reactor building.
To simulate the load conditions equivalent :o the loss-cf-ccolant accident, it would be necessary to pressurice the building to 90 psig.
Burns & Roe indicated that the instrumentation used would be the same as used in the initial 69 psig pressure tes: described in Appendix 3? Of the PSAR to determine the response of the structure frc: 0 to 69 psig.
JCFL indi:ated that the selected frequency of the 2nd, 10th and 20th rear of operation for proof testing was based upon its censui: ants' 7904270333 O rs 4 a. t) o,y r
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Roger S. Boy Maren 26, 1969 (3&R and Schup. 'k Associates) rec:c=endation.
It was indicated that building leak will be performed during these pressure proof c
tests; hcwever
. CPL woulc not indica:e at this tire whether the leak tests will be for ed at a lever building pressure or a: 60 psig.
We will centiaue to discuss with JCPL the pcssibility of performing the leak test at 60 psig for those leak tests which coincide with
- he proposed proof test at 69 psig.
3 urns & Rce and Schupack Associates bo:h indicated that the sanner in which the reactor building would be incrementally increased in pressure up to the 69 psig with surveillance of the building crack pattern would preclude a catastrophic failure of the building.
It was indicated that if cracks were to appear other than at discon-tinuities the pressuricatica of the building would stop and the
=easure:ents of the physical changes in the reac:or building analyzed to de:er=ine the cause and degree of deterioration in the reactor
_ building structural integrity.
Aircraft Protecticn Burns & Rce indicated the increased prestress loading of the reacter building will not increase.its capability to withstand an aircraft strike since the dynamic analysis of the reactor building response follewing an aircraft strike dces not include the effect of tendens or steel reinforce =ent.
The auxiliary building for TMI 12 will be designed to withstand the 200,000 pound aircraf: strike on its outside walls and roof so no special design of piping penetrations of the floor is recuired within the aux 111ary building.
Schedule The applicant. was informed that we would try to ec=plete our review cf the TMI d' <- ad e for the June 1969 ACRS =eeting but we would not be ce==itted to this date. JCPL recuested to be informed if the June ACRS date cannot be met to per=it the= ti=e to request an exemptica in order to meet the construction schedule. JCPL indicated excavation for TMI 12 started en March 3, 1969.
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Ray =cnd R. Powell, DRL A::achment:
List of Attendees cc:
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A. Morris F.
Schroeder Assistant Directors, RT, RC 3 ranch Chiefs, DRL CO (2) b3,X$
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JERSEY CENTRAL PCWER & LIGHT CCSA.l T
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.4 MEETING ATTENDA','CE MARC'4 11.. 1969 Jersev Central Schurack Associates J. 7. Neely A. 'lan Der ?cIl Pickard & Lowe Burns & Roe Keith Weedard J. C. Archer General Public Utilities R.
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Heward, Jr.
AEC - DRL ACRS R. Powell M. W.
Libarkin A. L. Gluck= ann E. G. Arnd:
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