ML19319D540
| ML19319D540 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 07/23/1973 |
| From: | Macceary R US ATOMIC ENERGY COMMISSION (AEC) |
| To: | Deyoung R US ATOMIC ENERGY COMMISSION (AEC) |
| Shared Package | |
| ML19319D541 | List: |
| References | |
| NUDOCS 8003170663 | |
| Download: ML19319D540 (4) | |
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v FLORIDA F0WER CORPORATIOW,1CRTSTAL RIVER IMIT NO. 3 - SECOND REQUESTz.
y FtX INFORMATION AND PC11T10H STATEMENTS, FSAR REVIEW Plant Name: Crystal RiversUnit No. 3 Lieemeing Stages - Q2-7SAR - OL Review Dockat Numbu, $0-302 Responsible Branch and Project b nnger: ' FUR - 4, B. Euckley Requasted completion Oate: July 13,1973 Applicant's Response nsta.Necessary for Coupletie:: of Uext Action Plannad on Projact: November 9, 1973 Demeription of Response:. Questions and Poaition Statenants.
Enview St.atus: Co@lete The second round review of tha r3AR has~ been ~coc: plated by the Structurni Essincering Branch in.1 we find that' additional infor stion and doctuan-tation is required before we can provide sr. ate:nents indicating thi.
acceptability of the facility.. 'Ihs additional docurecatation requested, wkleh concerne structural aspects, is conemhad.in the ~enclosura which*
prosants the SEB Fositions on these issues.. The material. reviewed te
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, - data consisted of-inform tion provided through Amnndacut No. 27 dated June 20, 1973.
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-p FLORIDA PONER CORPORATION CRYSTAL RIVER UNIT NO. 3 Docket No. 50-302 Second Request for Information and Position Statements 1.
The structural criteria for evaluating the design of Seismic Category I structures which may be subjected to the effects of high-energy line breaks outside the containment are not adequate.
An acceptable set of criteria is contained in the attached Docu-ment (B). Sufficient information should be provided to establish the extent of compliance with these design criteria. Where incon-sictencies or deviations from these criteria are proposed, justi-fication should be provided to demonstrate that your criteria are equivalent with respect to the applicable safety margins.
2.
The proposed program for tendon surveillance is not adequate.
A program for structural surveillance of prestressing tendons that is considered acceptable to the Structural Engineering Branch is that defined in the Regulatory Guide, No. 1.35.
Pertinent facts related to the position are included below.
The tendon surveillance program proposed by the applicant is unaccep-table due to the lack of supporting data to justify deviations from Regulatory Guide 1.35, Inurvice Surveillance of Ungrouted Tendons in Prestressed Concrete Containment Structures.
The following specific items and portions of that Guide that must be met or engineering justifications for deviations provided.
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Item C.4 - Surveillance interval of 1, 2, and 2 years after the acceptance test and then on a 5 year interval.
b.
Item C.S.b - The lift-off test should include a complete unloading cycle going to essentially complete detensioning of the tendon to identify broken or damaged wires or strands for all twenty-one (21) tendons.
c.
Items C.5.c - A minimum of six (6) dome t'andons with two (2) in each 60 group, five (5) vertical tendons and ten (10) hoop tendons all being random 1, but representative 1y distri-3 buted will undergo lif t-of f testing.
d.
Item C,5.e. - The criteria dafining the acceptance limits and procedures to be followed when the surveyed tendons do not all meet the requiremente are to become part of the tendon surveil-lance program, e.
Item C.6 - Previouily stressed wires or strands are to be removed and tested in accordance with this referenced section.
f.
Item C.7. - The other pertinent components of the tendon system are to be surbeyed as indicated within this section.
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Item C.8. - The reporting procedures are to be as defined in this section.
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- 3. ' The applicant should provide a susenary of natural frequencies and a
response loads (e.g. in the form of critical mode shapes and modal f
responses) determined by the f.eismic system analysis.
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