ML20086K405: Difference between revisions

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=Text=
=Text=
{{#Wiki_filter:-
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7 w.: .x
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    .                      O                                     O                                                  e PHILADELPHIA ELECTRIC COMPANY                                           .                      \
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PHILADELPHIA ELECTRIC COMPANY
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2301 MARKET STREET
2301 MARKET STREET
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      .                                                                                            >\                     pp July 29, 1974 Mr. A. Giambuss Deputy Director of Reactor Projects                                 50-277 United States Atomic Energy Cormiission Directorate of Licensing Washington, DC     20545
pp July 29, 1974 Mr. A. Giambuss 50-277 Deputy Director of Reactor Projects United States Atomic Energy Cormiission Directorate of Licensing Washington, DC 20545


==Dear Mr. Giambusso:==
==Dear Mr. Giambusso:==
==Subject:==
==Subject:==
Abnormal Occurrence The following occurrence was reported to Mr. Donald Caphton, A.E.C. Region I Regulatory Operations Office on July 19, 1974. Writ-                                                             ,
Abnormal Occurrence The following occurrence was reported to Mr. Donald Caphton, A.E.C. Region I Regulatory Operations Office on July 19, 1974. Writ-
        ' ten notification was made to Mr. James P. O'Reilly, Region I Regulatory Guc aiivn= Giii< e on .soiy i s, i9fh. in arcordaaca '." t h Sectien 6.7.2.P.
' ten notification was made to Mr. James P. O'Reilly, Region I Regulatory Guc aiivn= Giii< e on.soiy i s, i9fh.
in arcordaaca '." t h Sectien 6.7.2.P.
of the Technical Specifications, Appendix A of DPR-44 for Unit 2 Peach Bottom Atomic Power Station, the following report is being ;ubmitted to the Directorate of Licensing as an Abr,armal Occurrence.
of the Technical Specifications, Appendix A of DPR-44 for Unit 2 Peach Bottom Atomic Power Station, the following report is being ;ubmitted to the Directorate of Licensing as an Abr,armal Occurrence.


==Reference:==
==Reference:==
License Number DPR-44, Amendment Number 1
License Number DPR-44, Amendment Number 1
                                  ' Technical Specification Table 3 5.B Report No.:         50-277-74-38 Report Date:         July 29, 1974 Occurrence Date:
' Technical Specification Table 3 5.B Report No.:
                        ~
50-277-74-38 Report Date:
July 19, 19/4 Facility:           Peach Bottom Atomic Power Station R.D. 1, Delta, Pennsylvania             17314 Identificatien of Occurrenc.e:
July 29, 1974 Occurrence Date:
Setpoint of the Core Spray Sparger to Reactor Vessel differ-ential pressure switch, dPIS-2-14-438, found to be less conservative                                                             ;
July 19, 19/4
than allowed by the Technical Specifications.
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Facility:
_ Conditions Prior to Occurrence:                             !;            rf   ./
Peach Bottom Atomic Power Station R.D. 1, Delta, Pennsylvania 17314 Identificatien of Occurrenc.e:
l a                            ;
Setpoint of the Core Spray Sparger to Reactor Vessel differ-ential pressure switch, dPIS-2-14-438, found to be less conservative than allowed by the Technical Specifications.
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8 The reactor was at 100% power.                     .l     ,
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                                                                                                      ~
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        .. ' . J, July 29, 1974                                       '
Mr. A. Giambuss
Page 2.
.. '. J, July 29, 1974 Page 2.
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j Description of Occurrence:
j Description of Occurrence:
Line 69: Line 83:
Corrective Action:
Corrective Action:
The switch was immediately recalibrated and returned to service.
The switch was immediately recalibrated and returned to service.
Very truly yours, 3
Very truly yours, J)V ' uw
J)V ' uw
/
                                                      / M . J,. C'o'o ne'y
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3 Ass,' t Gen' 1 Superin'tendent.
4                                                       Generation Division ~
i 4
cc:   Mr. J. P. O'Reilly Director,. Region 1 linited States Atomic Energy Commission K ng of P us   a, PA   19406 i
Generation Division ~
cc:
Mr. J. P. O'Reilly Director,. Region 1 linited States Atomic Energy Commission K ng of P us a, PA 19406 i
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Latest revision as of 01:56, 14 December 2024

AO 74-38:on 740719,setpoint of Core Spray Sparger to Reactor Vessel Differential Pressure Switch DPIS-2-14-43B Found Less Conservative than Allowed by Tech Specs.Caused by Setpoint Drift.Switch Recalibr & Returned to Svc
ML20086K405
Person / Time
Site: Peach Bottom 
Issue date: 07/29/1974
From: Cooney M
PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To: Anthony Giambusso
US ATOMIC ENERGY COMMISSION (AEC)
References
AO-74-38, NUDOCS 8401270073
Download: ML20086K405 (2)
v • d • e


Text

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PHILADELPHIA ELECTRIC COMPANY

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2301 MARKET STREET

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AUG 11974" k PHILADELPHIA PA.19101 ll. s t.t A

(21518414o00

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pp July 29, 1974 Mr. A. Giambuss 50-277 Deputy Director of Reactor Projects United States Atomic Energy Cormiission Directorate of Licensing Washington, DC 20545

Dear Mr. Giambusso:

Subject:

Abnormal Occurrence The following occurrence was reported to Mr. Donald Caphton, A.E.C. Region I Regulatory Operations Office on July 19, 1974. Writ-

' ten notification was made to Mr. James P. O'Reilly, Region I Regulatory Guc aiivn= Giii< e on.soiy i s, i9fh.

in arcordaaca '." t h Sectien 6.7.2.P.

of the Technical Specifications, Appendix A of DPR-44 for Unit 2 Peach Bottom Atomic Power Station, the following report is being ;ubmitted to the Directorate of Licensing as an Abr,armal Occurrence.

Reference:

License Number DPR-44, Amendment Number 1

' Technical Specification Table 3 5.B Report No.:

50-277-74-38 Report Date:

July 29, 1974 Occurrence Date:

July 19, 19/4

~

Facility:

Peach Bottom Atomic Power Station R.D. 1, Delta, Pennsylvania 17314 Identificatien of Occurrenc.e:

Setpoint of the Core Spray Sparger to Reactor Vessel differ-ential pressure switch, dPIS-2-14-438, found to be less conservative than allowed by the Technical Specifications.

a

./

_ Conditions Prior to Occurrence:

rf l

i, > \\,

r 8

a The reactor was at 100% power.

.l

s lL ' t

,g 8401270073'740729'

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PDR ADOCK 05700277 g L"d b-n.

S PDR 8

t g sNT ntkliWL l

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Mr. A. Giambuss

.. '. J, July 29, 1974 Page 2.

l t

j Description of Occurrence:

During a routine instrument surveillance test the setpoint of dPIS-2-14-438 was found to have drifted outside the Technical Specification limits of 5 + 1 5 psid. The switch was found to trip at 6.7 psid.

Designation of Apparent Cause of Occurrence:

The cause of this setpoint failure is attributed to slight setpoint drift.

Analysis of Occurrence:

Due to the slight magnitude of the setpoint deviation, this occurrence has minimal safety implications.

Corrective Action:

The switch was immediately recalibrated and returned to service.

Very truly yours, J)V ' uw

/

/ M.

J,. C'o' ne'y o

3 Ass,' t Gen' 1 Superin'tendent.

i 4

Generation Division ~

cc:

Mr. J. P. O'Reilly Director,. Region 1 linited States Atomic Energy Commission K ng of P us a, PA 19406 i

1

!E u

1 i

.i 4

J

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