ML19319B774
| ML19319B774 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 08/13/1971 |
| From: | Morris P US ATOMIC ENERGY COMMISSION (AEC) |
| To: | Sampson G TOLEDO EDISON CO. |
| References | |
| NUDOCS 8001270244 | |
| Download: ML19319B774 (2) | |
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Docket No. 50-346 AUG 13 bil 9
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'Ihe Toledo Edison Cowany ATW:
Mr. Clonn J. 5 ampson i
Vice President, Fower D-420 Fadison Avenue Toledo, Ohio 43601 Centlemen:
On June 19, 1971 the AEC adopted interim seceptance criteria for t'1e performance of acer;nney core cooling system (ECC3) in light-asator nuclear peser plants. A ecoy of the Commission's interin policy state-cent on this metter is enclosed for your information. In accerdance rith Section IV.3. of the interim policy statet,cnt, before vc can cowinte our evaluation of the ICC3 for the Davis nesso Nuclosr Pouar Station, we need information to chew that the avs tna meta the general criteria of Section IV. A. using a suitable ovaluation redet. % are continuin;; discussions with representatives of the nabcock & 'Jilcox Campsey (3G) that are directed twinrd establishing a suita' ale evaluation codel using af.W corruter codes for evaluation of plants inesrooratin a nuclear steen supply system dcair,ned by BW.
The infor=ation that we need regarding these analyses 1::
(1) For the bred size range, loestfon and ty=e mationed in Ar >cadix A, Part 1, of the interim policy statomnt, provide infornatian per-taining to (a) the systa : pressura, (b) the hot-spot eind tenser i-ture, local mass velocity, fluid teerature, and he se tran9for coefficient, (c) the core preseurn drop, quality, and ens velocity.
(d) the heat flux distribution in the hot chanoc1, (c) the finv rates in the upper and lower planu:ss, (f) the flow rates in the brokon and intact cold-le3 and het-leg nip '.ng, (g) the fla's rate out of the break, and (h) percent clad mtsi-vator reaction.
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(2) Provide a detailed discussion of the calculation used to predict heat transfer during the reflood portion of the transient.
(3) Discuss in detail any deviations in the evaluation model used in the foregoing studies from that described in Appendix A, Part 1 i
of the interim policy statement, if that model is ue.d.
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SU8HIAGE >
DATE >
Pesum AEC-Ste (Rev. 9-53) ABCM 0240 e u s cov.ao.utur mure.a opcs i nn 4 e _4e,
8001270 294 8
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The Toledo Edison Cogany 9' D
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In addition, you should submit for our review any changes to the Technical Specifications for the plant that may be required on the basis of the results of your analyses.
1 The required additional information on ECCS performance should be aubmitted
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with your application for an operating license. If you prefer to submit i
it at an earlier date, we will review it in accordance ".ith the priorities that exist at that time assi sdvise you of the results of our assessment upon completion.
Sincerely, j
Original 50ed 111 P. A.Moni8 1,
i Peter A. !brria. Director Division of Reactor Licensing Cnclosure:
AEC Interin Policy Statement ec: Donald H. Hauser, Esq.
The Cleveland Electric Illuminating Corpsny DISTRIBUTION:
P. O. Box 5000, Rooin 610 AEC FDR Cleveland, Ohio 44101 Local PDR Docket File (
Y Leslie Henry, Esq.
PWR-3 Baading Fuller, Senay, Henry, & Hodge
- DR Reading 800 Owens-Illinois Bldg.
DEL Reading 405 Madison Aw nue CRBeck Toledo, Ohio 43504 190(ann 75chroeder Gerald Charnoff, Esq.
RSBody Shaw, Pittman, Potts, Trowbridge, & lbdden RCDeYoung 910 17th S treet. N.W.
DSkovbolt Washington, D. C.
20006 TRWilson RGCase RMacesry ElElecker DRS/ DEL Branch Chiefs VWilson CGC ACRS (16)
WNver (2)
Seismic Design consultant Oloon CRESS omcE>
net PWR.3 m:AD/Ne=
ML DEL T1/R5-7 ajb Galle[a}b Schroeder Morris SUR9sAast >
7/30/71 7f 7773 37, jf1 8/g /71_
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Form AEC-Sl0 (Rev. 9-53) AECM 0240
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