ML20086D362
| ML20086D362 | |
| Person / Time | |
|---|---|
| Site: | Robinson  |
| Issue date: | 08/06/1976 |
| From: | Mcgirt J CAROLINA POWER & LIGHT CO. |
| To: | Moseley N NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| Shared Package | |
| ML20086D349 | List: |
| References | |
| NUDOCS 8312010194 | |
| Download: ML20086D362 (2) | |
Text
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h Caro &ww Power & LicM Compeny emwavw
- 11. B. ROBINSON STEAM ELECTRIC PLG'T
. p Post Office Box 790 Bortsville, South Carolina gpy August 6, 1976 L
Robinson File-No. 2-0-4-a-1 Mr. Nor: man C. Merneley, Director Director of Regulatory Operations Nuclear Regulatory Cocmaission Region II, Suite 818 230 Peachtree Street. N.W.
Atlanta, Georgia 30303 Mr. John G. Davia. Acting Director Director'of Regulatory Nuclear Hegulatory Cocumission'
.=
Washington, D. C.
205G5
Dear Sirs:
- In accordance with Section -6'.6'.1.a ' of' the Technical' Specifications,,
~
the follcnring Reportable Occurrence :ih submitted:
On August 6, 1976, Carolina Power & Light Company was notified by
' ' ' Westinghouse E3 0ctric Corporation of ~recent developments that bear-on the Westinghouse safety analyses.
The developments which af fect H. B. Robins.on Unit No. 2 are summarized belou:
ECCS analyses treated the fluid te:sperature in the upper head 1.
Past
.j region.as equal to vessel inlet temperature.(' Cold).
Recent tests
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~ 'and cethoda discount this,"and ' Indicate the temperature to be ' nearer-q to : that;' of '. T2for.. The consequences of this is an 1apact on peak clad.' temperature on the LOCA analysis which' resultc in' a necessary.
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, reduction in Fq.frcm 2.30 to 2.27 for operation' at 22CO 3T{.,-
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separate ' development involved "a"recent ' rest vhich Sndicated that-i the rod how DN3 penalty is higher than previously used as a licens tng J:
_ basis. M This' ndditiona17 penalty.' resultn ' in an esti:aated 93 reduction J l
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'""'in DNBR'.
Incorporating this penalty reqv. iresa 4% reduction in [ ' '
i the limiting vnlues for.Y ar,d Ej, as described As.an interium action, in Section 3.10.2 of the Technical' Specification 3 -have been reaucea to I
gy
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^2.27 and '1 49 respectively, pending ~ further investigation.
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.L_._,- - Latter.to,_Mr...Moseley-and..Mrs Davis Coot'd.
- August ' 6,.1976 -..
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Thla' finding' constitutoo ~ a reporthble' occurrence as defined 'in Technical' specificatios 6.9.2.a.8"and was reported 'to Mr. Dick ~ Parker; of ~NRC7' Atlanta and Mr. Ilarold R. Banks of CP&L, Raleigh, on August 6,1976.
Yours very truly,
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Jack B. McGirt,. M.mnagere
- 11; B'.... Robinson. SEG Plant 9
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Carohne Power 3r L,5gM Company y:..g 1 H.. B. ROBINSON STEAM ELECTRIC PLANT
'iF.d d Post Office Box 790 l :. f.5
,.i ' g.M Hartsville.. South Carolina
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. 18, 1976' y
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Robinson File No. 2-0-4-a--1' M_.
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.2 3-Mr. Norman C. Moseley, Director
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Directorate of Regulatory Operations
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U'.' S.. Nuclear Regulatory Coasmission -
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Reg 16n II,. Sulte 818' 230 Peachtree Street, N.W.
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Mr. John C. Daylir. Acting Director-
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Director of Regulatory L M,?,.S U'
S.. Nuclear Regulatory Cocamission
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-Washington, D. C.
20545 V $1:
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Dear Sirs:
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In. accortlance with nection 6.9.2.a.5 of the Technical
- Specifications
- 3.s the. following Reportable Occurrence is reported
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On August 17, 1976 while performing PT 22 on the Anvihry.Feedwater
% y System, v2-16A would not open electrically from the RTGB.
The redundant.
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equipment operated satisfactorily proving the ability to feed the stca:s
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@M j- -. generator in emergency conditions.
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l This van reported' to Mr. Dick Parker of NRC Atlanta and to Nuclear l
Ceneration Section. Raleigh'on August 18,.1976.
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t Yours very truly,.
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ack B'..McGirt, Manager.
I.N H. B. - Robinson SEG Plant
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