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=Text=
=Text=
{{#Wiki_filter:REGULATORY INFORMATION DISTRIBUTION SYSTEM (RID DISTRIBUTION FQR INCOMING MATERIAL                           50-3     eS REC:   GRIER B H                   ORG: CURTIS N   W                   DOCDATE: 04j'17/78
{{#Wiki_filter:REGULATORY INFORMATION DISTRIBUTION SYSTEM (RID DISTRIBUTION FQR INCOMING MATERIAL 50-3 eS REC:
  'RC                                PA PNR  8. LIGHT                  DATE RCVD: 05J04f78 DOCTYPE:   LETTER   NOTARIZED: NO                                         COPIES RECEIVED
GRIER B
H
'RC ORG:
CURTIS N
W PA PNR
: 8. LIGHT DOCDATE: 04j'17/78 DATE RCVD: 05J04f78 DOCTYPE:
LETTER NOTARIZED:
NO COPIES RECEIVED


==SUBJECT:==
==SUBJECT:==
LTR 1   ENCL 0 FURNISHING INFQ RE CONSTRUCTION DEFICIENCY REPT CONCERNING WESTINGHOUSE SUPPLIED MEDIUM VOLTAGES METAL CLAD SWITCHGEAR WHICH MAY NOT BE FULLY CAPABLE OF WITHSTANDING THE POSTULATED SEISMIC EVENT FOR SUB JECT FACILITY... ADVISING REQUIRED DEFINITIVE REPT     WI PLANT NAME:SUSQUEHANNA UNIT                                 REVIEWER  INITIAL:  X JM SUSQUEHANNA'     UNIT 2                         DISTRIBUTER   INITIAL:~~
LTR 1
ENCL 0 FURNISHING INFQ RE CONSTRUCTION DEFICIENCY REPT CONCERNING WESTINGHOUSE SUPPLIED MEDIUM VOLTAGES METAL CLAD SWITCHGEAR WHICH MAY NOT BE FULLY CAPABLE OF WITHSTANDING THE POSTULATED SEISMIC EVENT FOR SUBJECT FACILITY...ADVISING REQUIRED DEFINITIVE REPT WI PLANT NAME:SUSQUEHANNA UNIT SUSQUEHANNA' UNIT 2 REVIEWER INITIAL:
XJM DISTRIBUTER INITIAL:~~
DISTRIBUTION OF THIS MATERIAL IS AS FOLLOWS ++++<%%%+<+<<<+<<+
DISTRIBUTION OF THIS MATERIAL IS AS FOLLOWS ++++<%%%+<+<<<+<<+
CONSTRUCTION DEFICIENCY REPORT       < 10CFR50. 55(E).
CONSTRUCTION DEFICIENCY REPORT
(DISTRIBUTION CODE   3004>
< 10CFR50. 55(E).
FQR ACTION:     ASST DIR VASSALLO+~LTR ONLY(i>        BR  CHIEF PARR++LTR ONLY(i    >
(DISTRIBUTION CODE 3004>
PRO     G~MINER4NLTR ONLY< 1)        LIC  ASST RUSHBRQQK<~LTR    ONLY(i)
FQR ACTION:
INTERNAL:        REG   FIL ~~     gNLY< 1)          NRC PDR++LTR    ONLY<i)
INTERNAL:
                        . E+~LTR ONLY(2)               QELD++LTR ONLY(i>
EXTERNAL:
GOSSICK 5 STAFF+4LTR ONLY<i)          MIPC4+LTR ONLY< 1)
ASST DIR VASSALLO+~LTR ONLY(i>
BOYD++LTR ONLY(1)                     DEYOUNG+>LTR ONLY(i>
PRO G~MINER4NLTR ONLY< 1)
HELTEMES+<LTR ONLY(i)                R. MATTSON++LTR ONLY<i)
REG FIL ~~
KNIGHT~+LTR ONLY(1 >                  ROSS+~LTR ONLY(1>
gNLY< 1)
TEDESCO+~LTR ONLY<i)                  EISENHUT++LTR ONLY< 1)
. E+~LTR ONLY(2)
STANDARDS DEV. ++LTR ONLY(1>          K SEYFRITJIE++LTR ONLY(i    >
GOSSICK 5 STAFF+4LTR ONLY<i)
EXTERNAL:        LPDR S WILKES BARRE> PA~+LTR ONLY(
BOYD++LTR ONLY(1)
HELTEMES+<LTR ONLY(i)
KNIGHT~+LTR ONLY(1 >
TEDESCO+~LTR ONLY<i)
STANDARDS DEV. ++LTR ONLY(1>
LPDR S WILKES BARRE>
PA~+LTR ONLY(
TIC4I~LTR ONLY(1 >
TIC4I~LTR ONLY(1 >
NSIC++LTR ONLY(1)
NSIC++LTR ONLY(1)
FERD DREHERfIE4~>LTR ONLY(i)
FERD DREHERfIE4~>LTR ONLY(i)
ACRS     CAT B++LTR ONLY<16)
ACRS CAT B++LTR ONLY<16)
DISTRIBUTION:     LTR 41       ENCL 0                         . CONTROL NBR:   78124 0 - 1 SI ZE: 2P                                                                                  I THE END
BR CHIEF PARR++LTR ONLY(i >
LIC ASST RUSHBRQQK<~LTR ONLY(i)
NRC PDR++LTR ONLY<i)
QELD++LTR ONLY(i>
MIPC4+LTR ONLY< 1)
DEYOUNG+>LTR ONLY(i>
R.
MATTSON++LTR ONLY<i)
ROSS+~LTR ONLY(1>
EISENHUT++LTR ONLY< 1)
K SEYFRITJIE++LTR ONLY(i >
DISTRIBUTION:
LTR 41 ENCL 0 SI ZE:
2P THE END
. CONTROL NBR:
78124 0 - 1 I


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r' \ LIP TWO NORTH NINTH STREET,     ALLENTOWN, PA.         'I 8101   PHONE: (215) 821-5151 NORMAN W. CURTIS Vice President Engineering 8 Construction                                                             c<<                     C~
r' \\ LIP TWO NORTH NINTH STREET, ALLENTOWN, PA.
1.1 821.5381                                                                                              <<I               CIl,'fr Q
'I 8101 PHONE: (215) 821-5151 NORMAN W. CURTIS Vice President Engineering 8 Construction 821.5381 April 17, 1978 Mr. Boyce H. Grier Director, Region I U.S. Nuclear Regulatory Comhtission 631 Park Avenue c<<
                                                                                                                          ~rrr April 17,        1978 r%
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                                                                                                        @err M Mr. Boyce H. Grier Director, Region            I                                                            ff$                   X U.S. Nuclear Regulatory Comhtission                                                        CA 631 Park Avenue King of Prussia, Pennsylvania                 19406 SUSQUEHANNA STEAM ELECTRIC STATION INTERIM REPORT OF REPORTABLE DEFICIENCY
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                                                                                            ~@yy.,
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REGARDING POTENTIAL TRANSFORMERS ON 4.16KV SWITCHGEAR DOCKET NOS             50 387 g'0 388
King of Prussia, Pennsylvania 19406 SUSQUEHANNA STEAM ELECTRIC STATION
                                                                                                                  ~i g'/gg LICENSE NOSI CPPR-101,           CPPR-102 ERs   100450/100508                                               FILE 840-4 PLA-246 Dear     M . Griers This relates to a reportable deficiency, under the provision of 10CFR 50.55(e),
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which was.       identified to Mx' A Toth NRCg Region I by Mr. A. R. Sabol, PPGL during a'elephone conversation on 3/31/78. The deficiency involves Westing-house supplied medium voltage, metal clad switchgear which may not be fully capable of withstanding the postulated seismic event for the Susquehanna plant.
INTERIM REPORT OF REPORTABLE DEFICIENCY REGARDING POTENTIAL TRANSFORMERS ON 4.16KV SWITCHGEAR
Z Specifically, Westinghouse C
~i g'/gg DOCKET NOS 50 387 g'0 388 LICENSE NOSI CPPR-101, CPPR-102 ERs 100450/100508 FILE 840-4 PLA-246 Dear M. Griers This relates to a reportable deficiency, under the provision of 10CFR 50.55(e),
has advised that, the potential transformer secondary disconnecting contact assemblies on equipment similar to that supplied for Susquehanna have failed to withstand recent seismic tests.                                   Westinghouse further stated that, under seismic conditions,                       it     is possible that the secondary contacts could be dislodged from their normal positions causing open circuiting or shorting of the secondary circuits.
which was. identified to Mx' A
It has     been established that eight of the sixteen units, purchased for use in safety related applications, have been shipped to the SSES plant site. To preclude installation of this equipment, Bechtel has identified (3/16/78) these eight units in a QA Stop Work Report (No. 78-06) as being nonconforming. As a result, Bechtel QC has written a Nonconformance Report (NCR No. 2514) and each switchgear unit has had a "Hold Tag" attached.
Toth NRCg Region I by Mr. A. R. Sabol, PPGL during a'elephone conversation on 3/31/78.
The deficiency involves Westing-house supplied medium voltage, metal clad switchgear which may not be fully capable of withstanding the postulated seismic event for the Susquehanna plant.
Z C
Specifically, Westinghouse has advised that, the potential transformer secondary disconnecting contact assemblies on equipment similar to that supplied for Susquehanna have failed to withstand recent seismic tests.
Westinghouse further stated that, under seismic conditions, it is possible that the secondary contacts could be dislodged from their normal positions causing open circuiting or shorting of the secondary circuits.
It has been established that eight of the sixteen units, purchased for use in safety related applications, have been shipped to the SSES plant site.
To preclude installation of this equipment, Bechtel has identified (3/16/78) these eight units in a QA Stop Work Report (No. 78-06) as being nonconforming.
As a result, Bechtel QC has written a Nonconformance Report (NCR No.
2514) and each switchgear unit has had a "Hold Tag" attached.
Bechtel Engineering has reviewed the system design and they have concluded that the worst condition exists with the loss, on each switchgear bus, of the potential transformers on both incoming feeders coupled with the loss of one, or both, of the bus voltage monitoring transformers.
Bechtel Engineering has reviewed the system design and they have concluded that the worst condition exists with the loss, on each switchgear bus, of the potential transformers on both incoming feeders coupled with the loss of one, or both, of the bus voltage monitoring transformers.
78124003k err r
78124003k err r PENNSYLVANIA POWER 8
PENNSYLVANIA POWER         8     LIGHT COMPANY
LIGHT COMPANY


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Mr. Boyce pi. Grier                         2                       April 17'978 Under this condition, the incoming bus feeders from the safeguard transformers would be automatically disconnected and the diesel generator power source connected restoring power to the bus.
Mr. Boyce pi. Grier 2
The feeder breakers supplying power to the shutdown loads are normally open.
April 17'978 Under this condition, the incoming bus feeders from the safeguard transformers would be automatically disconnected and the diesel generator power source connected restoring power to the bus.
A LOCA   occurring during or after the postulated seismic event would initiate         a closing signal to the motor feeder breakers of the shutdown loads, i.e. RHR and Core Spray Pumps.
The feeder breakers supplying power to the shutdown loads are normally open.
These feeder breakers would close and immediately trip due to the false undervoltage indication as sensed by the undervoltage relay. The circuit breakers would be unable to close again because of 'the permanent undervoltage trip signal     imposed on them.
A LOCA occurring during or after the postulated seismic event would initiate a closing signal to the motor feeder breakers of the shutdown loads, i.e.
The above     analysis assumes that the failures concurrently occur   on all'redundant switchgear buses.
RHR and Core Spray Pumps.
Bechtel Engineering has further concluded that         this loss of capability to supply power   to shutdown equipment under a LOCA constitutes a safety hazard to the operation of the plant and represents a deficiency in final design.
These feeder breakers would close and immediately trip due to the false undervoltage indication as sensed by the undervoltage relay.
As proposed     remedial action, Westinghouse has advised that modification kits are available which, when installed, would eliminate the faulty secondary dis-connecting assemblies from the circuit. This is accomplished by hard wiring
The circuit breakers would be unable to close again because of 'the permanent undervoltage trip signal imposed on them.
'the secondary to the load circuits. Bechtel Engineering is considering the use of these modification kits pending assurance from Westinghouse that this modi-fication will meet all the requirements of the technical specification.
The above analysis assumes that the failures concurrently occur on all'redundant switchgear buses.
We anticipate submittal of the required definitive report of the deficiency by 7/31/78.
Bechtel Engineering has further concluded that this loss of capability to supply power to shutdown equipment under a LOCA constitutes a safety hazard to the operation of the plant and represents a deficiency in final design.
Very   truly yours, N. W. Curtis Vice President-Engineering         6 Construction
As proposed remedial action, Westinghouse has advised that modification kits are available which, when installed, would eliminate the faulty secondary dis-connecting assemblies from the circuit.
$ 6iG/ARS: mcb cc:   Ms. M. C. Bar to              N4      Mr. H. F. Lilligh        Bechtel SSES Mr. N. W. Curtis            N4      Mr. E. M. Mead            N5 Mr. R. L. Emery             N4     Mr. M. R. Muir              Bechtel SFHO Mr. J. W. Geiling        N5      Mr. J. R. Schmiedel        Bechtel SFHO Mr. J. D. Green            SSES    Mr. R. J. Shovlin           N4 Mr. H. L. Harris          SSES    SpsE Correspondence   File   N3 Mr. Jo To Kauffman        TW16    Susquehanna   Letter File   N3}}
This is accomplished by hard wiring
'the secondary to the load circuits.
Bechtel Engineering is considering the use of these modification kits pending assurance from Westinghouse that this modi-fication will meet all the requirements of the technical specification.
We anticipate submittal of the required definitive report of the deficiency by 7/31/78.
Very truly yours, N.
W. Curtis Vice President-Engineering 6 Construction
$6iG/ARS:
cc:
Ms.
Mr.
Mr.
Mr.
Mr.
Mr.
Mr.
mcb M. C.
N.
W.
R. L.
J.
W.
J.
D.
H. L.
Jo To Barto Curtis Emery Geiling Green Harris Kauffman N4 N4 N4 N5 SSES SSES TW16 Mr. H. F. Lilligh Mr. E. M. Mead Mr. M. R. Muir Mr. J.
R. Schmiedel Mr. R. J. Shovlin SpsE Correspondence File Susquehanna Letter File Bechtel SSES N5 Bechtel SFHO Bechtel SFHO N4 N3 N3}}

Latest revision as of 04:36, 7 January 2025

Letter Regarding an Interim Report of Reportable Deficiency Regarding Potential Transformers on 4.16KV Switchgear and Advising the Commission That the Definitive Report Will Be Submitted by July 31, 1978
ML18024A073
Person / Time
Site: Susquehanna  Talen Energy icon.png
Issue date: 04/17/1978
From: Curtis N
Pennsylvania Power & Light Co
To: Grier B
NRC Region 1
References
Download: ML18024A073 (5)
v • d • e


Text

REGULATORY INFORMATION DISTRIBUTION SYSTEM (RID DISTRIBUTION FQR INCOMING MATERIAL 50-3 eS REC:

GRIER B

H

'RC ORG:

CURTIS N

W PA PNR

8. LIGHT DOCDATE: 04j'17/78 DATE RCVD: 05J04f78 DOCTYPE:

LETTER NOTARIZED:

NO COPIES RECEIVED

SUBJECT:

LTR 1

ENCL 0 FURNISHING INFQ RE CONSTRUCTION DEFICIENCY REPT CONCERNING WESTINGHOUSE SUPPLIED MEDIUM VOLTAGES METAL CLAD SWITCHGEAR WHICH MAY NOT BE FULLY CAPABLE OF WITHSTANDING THE POSTULATED SEISMIC EVENT FOR SUBJECT FACILITY...ADVISING REQUIRED DEFINITIVE REPT WI PLANT NAME:SUSQUEHANNA UNIT SUSQUEHANNA' UNIT 2 REVIEWER INITIAL:

XJM DISTRIBUTER INITIAL:~~

DISTRIBUTION OF THIS MATERIAL IS AS FOLLOWS ++++<%%%+<+<<<+<<+

CONSTRUCTION DEFICIENCY REPORT

< 10CFR50. 55(E).

(DISTRIBUTION CODE 3004>

FQR ACTION:

INTERNAL:

EXTERNAL:

ASST DIR VASSALLO+~LTR ONLY(i>

PRO G~MINER4NLTR ONLY< 1)

REG FIL ~~

gNLY< 1)

. E+~LTR ONLY(2)

GOSSICK 5 STAFF+4LTR ONLY<i)

BOYD++LTR ONLY(1)

HELTEMES+<LTR ONLY(i)

KNIGHT~+LTR ONLY(1 >

TEDESCO+~LTR ONLY<i)

STANDARDS DEV. ++LTR ONLY(1>

LPDR S WILKES BARRE>

PA~+LTR ONLY(

TIC4I~LTR ONLY(1 >

NSIC++LTR ONLY(1)

FERD DREHERfIE4~>LTR ONLY(i)

ACRS CAT B++LTR ONLY<16)

BR CHIEF PARR++LTR ONLY(i >

LIC ASST RUSHBRQQK<~LTR ONLY(i)

NRC PDR++LTR ONLY<i)

QELD++LTR ONLY(i>

MIPC4+LTR ONLY< 1)

DEYOUNG+>LTR ONLY(i>

R.

MATTSON++LTR ONLY<i)

ROSS+~LTR ONLY(1>

EISENHUT++LTR ONLY< 1)

K SEYFRITJIE++LTR ONLY(i >

DISTRIBUTION:

LTR 41 ENCL 0 SI ZE:

2P THE END

. CONTROL NBR:

78124 0 - 1 I

~i It

~ V

i w ~ \\ ~

fsr I-AP>>

r' \\ LIP TWO NORTH NINTH STREET, ALLENTOWN, PA.

'I 8101 PHONE: (215) 821-5151 NORMAN W. CURTIS Vice President Engineering 8 Construction 821.5381 April 17, 1978 Mr. Boyce H. Grier Director, Region I U.S. Nuclear Regulatory Comhtission 631 Park Avenue c<<

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King of Prussia, Pennsylvania 19406 SUSQUEHANNA STEAM ELECTRIC STATION

~@yy.,

INTERIM REPORT OF REPORTABLE DEFICIENCY REGARDING POTENTIAL TRANSFORMERS ON 4.16KV SWITCHGEAR

~i g'/gg DOCKET NOS 50 387 g'0 388 LICENSE NOSI CPPR-101, CPPR-102 ERs 100450/100508 FILE 840-4 PLA-246 Dear M. Griers This relates to a reportable deficiency, under the provision of 10CFR 50.55(e),

which was. identified to Mx' A

Toth NRCg Region I by Mr. A. R. Sabol, PPGL during a'elephone conversation on 3/31/78.

The deficiency involves Westing-house supplied medium voltage, metal clad switchgear which may not be fully capable of withstanding the postulated seismic event for the Susquehanna plant.

Z C

Specifically, Westinghouse has advised that, the potential transformer secondary disconnecting contact assemblies on equipment similar to that supplied for Susquehanna have failed to withstand recent seismic tests.

Westinghouse further stated that, under seismic conditions, it is possible that the secondary contacts could be dislodged from their normal positions causing open circuiting or shorting of the secondary circuits.

It has been established that eight of the sixteen units, purchased for use in safety related applications, have been shipped to the SSES plant site.

To preclude installation of this equipment, Bechtel has identified (3/16/78) these eight units in a QA Stop Work Report (No. 78-06) as being nonconforming.

As a result, Bechtel QC has written a Nonconformance Report (NCR No.

2514) and each switchgear unit has had a "Hold Tag" attached.

Bechtel Engineering has reviewed the system design and they have concluded that the worst condition exists with the loss, on each switchgear bus, of the potential transformers on both incoming feeders coupled with the loss of one, or both, of the bus voltage monitoring transformers.

78124003k err r PENNSYLVANIA POWER 8

LIGHT COMPANY

4

\\,'Kr J

Mr. Boyce pi. Grier 2

April 17'978 Under this condition, the incoming bus feeders from the safeguard transformers would be automatically disconnected and the diesel generator power source connected restoring power to the bus.

The feeder breakers supplying power to the shutdown loads are normally open.

A LOCA occurring during or after the postulated seismic event would initiate a closing signal to the motor feeder breakers of the shutdown loads, i.e.

RHR and Core Spray Pumps.

These feeder breakers would close and immediately trip due to the false undervoltage indication as sensed by the undervoltage relay.

The circuit breakers would be unable to close again because of 'the permanent undervoltage trip signal imposed on them.

The above analysis assumes that the failures concurrently occur on all'redundant switchgear buses.

Bechtel Engineering has further concluded that this loss of capability to supply power to shutdown equipment under a LOCA constitutes a safety hazard to the operation of the plant and represents a deficiency in final design.

As proposed remedial action, Westinghouse has advised that modification kits are available which, when installed, would eliminate the faulty secondary dis-connecting assemblies from the circuit.

This is accomplished by hard wiring

'the secondary to the load circuits.

Bechtel Engineering is considering the use of these modification kits pending assurance from Westinghouse that this modi-fication will meet all the requirements of the technical specification.

We anticipate submittal of the required definitive report of the deficiency by 7/31/78.

Very truly yours, N.

W. Curtis Vice President-Engineering 6 Construction

$6iG/ARS:

cc:

Ms.

Mr.

Mr.

Mr.

Mr.

Mr.

Mr.

mcb M. C.

N.

W.

R. L.

J.

W.

J.

D.

H. L.

Jo To Barto Curtis Emery Geiling Green Harris Kauffman N4 N4 N4 N5 SSES SSES TW16 Mr. H. F. Lilligh Mr. E. M. Mead Mr. M. R. Muir Mr. J.

R. Schmiedel Mr. R. J. Shovlin SpsE Correspondence File Susquehanna Letter File Bechtel SSES N5 Bechtel SFHO Bechtel SFHO N4 N3 N3

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