ML18017A102
| ML18017A102 | |
| Person / Time | |
|---|---|
| Site: | Susquehanna  |
| Issue date: | 03/28/1980 |
| From: | Curtis N PENNSYLVANIA POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML18017A103 | List: |
| References | |
| NUDOCS 8004080516 | |
| Download: ML18017A102 (3) | |
Text
RFGULA TORY I vFOR"iA 1 ]ON DIS l'R IBUTIO'l SYS l E'-l (RIOS)
ACCESS IOiu V<3R FAG IL:50" 587 50-388 AUT]< ~ SAME CURTIS s TV ~ n ~
RECIP.~A "E
- 300405 )5] 6 nOC
~ DATE.'0/03/28 NOTARIZED:
VO Susquehanna Steam Electric Stationr Unit ir pennsylva Susnuehanna Steam Electric Stations Unit 2s Pennsvlva AUTHOR AFFILIATION Pennsy1 vani a Power 8 Liaht Co ~
HEC lP IEIVT AFFILIATION DOCKET 05 0038 SUB]ECT; Final deficiency rept re hyoramotor actuator springs.
Affected damoers have been identi fied iI'eing control led, Actuators will either be replaced or tested to establish adequacy.
f>ISTRIRDTIOrf CODE:
fiO ISO COPIES PECE IVES:LTS EDCL Sr SIZE:
TITLE; Construction Deficiency Reoor t (10CFR50.55E)
(BOOTES: ~W~W X g mr=
C'-~~ W&Wre-~m~ M~@'Y>
ACTION:
REC I P I EN T COPIES Iu CODE,/WA'->E LTTR EVCL 14" PH ~~j~~g 1
1 20 LA ~~rC mS RECIP IEVT COPIES IO CODE/VA'lE L I TR EiVCL 15 BC ~n. A-5 21 AD L ~~
1 1
[vTEHivAL: 01 FIL 05 W 0B vpA 10 GAB 1'5F IELD COUR/IE s'1
]7 AD PlAIVT SYS 22 DI R DP'1 AO/RCI/IE AEOO GEOSCIEIUCES BR ISC SYS BR
'LiEC'ri ENG BR STRIJCT ENG BH EXTERNAL: 03 LPDR 24 ACRS 1
1 2
2
]
1 1
1 1
1 1
1 1
1 1
1 1
1 1
1 1
1 1
1 1
1
]6 ib 02 NRC PDR 07 EDO L STAFF 09 DEPY OIR DPf'<
11 STAh!OROS DEV ib AD FOR EVGR 17 AD'FAC SFl'Y 23 OELD AD/SITE TECH DIRECTOR DSE HANAUERSSs
~lATL FNG BR POl<ER SYS 8R 04 BASIC
~ &&1E
~PA ~2.
ei&&wpj SV'B ~~
"P~ 10 l989 TOTAL NUEBER OF COPIES REQUIRED:
LTTR ~
EisCL
TWO NORTH NINTH STREET, ALLENTOWN, PA.
18101 PHONE: (215) 821-5151 NORMAN W. CURTIS Vice President Engineering 8 Construction 821-5381 March 28, 1980 Mr. Boyce H. Grier Director, Region I U. S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, Pennsylvania 19406 SUSQUEHANNA STEAM ELECTRIC STATION FINAL REPORT OF A DEFICIENCY ON ZTT HYDRAMOTOR ACTUATOR SPRINGS ERs 100450/100508 FILE 840-4 PLA-464 160-M33 6A
Dear Mr. Grier:
This letter confirms a report made by telephone to NRC Inspector Mr. R. Gallo on January 24, 1980.
Zn that discussion, Mr. Gallo was advised that the above subject condition was under evaluation for reportability under the pxovisions for 10CFR50.55(e)
The condition was reported to the Commission under the provisions of 10CFR21 by ZTT General Controls, GlendaleiCA in their letter dated December 7,
1979 (Attachment 1).
The deficiency x'elates to "Q" listed dampers supplied by American Wazming and Ventilating Inc.
(AWV) and involves a spring, ZTT part No. 17443A, used in ZTT NH91, 92, 93, 94, 95, 96 and 98 Milliampere Hydramotor Actuators.
The springs were discovered to be manufactured from incorrect material and will, upon being actuated through greater than a three (3) inch stroke take a permanent set.
This deformation results in a decreased force output of between 40 and 160 pounds for varying positions of spring compression.
Bechtel Corporation has evaluated the actuators provided under Purchase Order 8856-M-336AC for the Susquehanna Steam Electric Station for reportability under provisions of 10CFR50.55(e).
These actuators are essential devices to support the HVAC system during LOCA and normal plant operation.
Zn particular, Bechtel has specifically analyzed actuators tagged HDM07831A and HDM07831B for safety implications.
These actuators aze supporting the control room HVAC systems and are located on the "A" and "B" fan discharge.
When "A" fan is in operation, "B" fan is in stand-by.
Zf HDM07831B fails to close, "An fan supply air will short circuit thru "B" fan and less air will be delivered to the cont"ol room.
The control room will then lose pressurization.
PENNSYLVANIA POWER 8.
LIGHT COMPANY f'
Mr. Boyce H. Grier 2
March 28, 1980 Other actuators also identified in the Purchase Oxder perform essential functions; however, their failure would be less significant than the failure of the two mentioned above.
PPGL and Bechtel have therefore concluded that this deficiency, were it to have remained uncorrected, could have affected adversely the safety of operations of the Susquehanna Nuclear Power Plant at any time throughout the expected lifetime of the plant.
The deficiency represents a significant deviation from performance specifications which will require extensive repair to establish the adequacy of the HVAC system to meet the c iteria and bases stated in the safety analysis report.'ll affected dampers have been identified and are presently being controlled by Bechtel Field Inspection Procedure G-3, "Processing of Nonconforming Items",
under NCR 5283.
Final corrective action for the defective actuators will consist of either material replacement as indicated in ITT's letter of December 6,
1979 to AWV (Attachment
- 2) or through performance tests to establish their adequacy as mentioned in ITT's letter of December 7, 1979 to the NRC (Attachment 1).
ITT's internal corrective action for the condition is outlined in their letter to AWV (Attachment 2).
Since the details of this report provide information relevant to the reporting requirements of 10CFR21, this correspondence is considered to also discharge any fozmal responsibility PPaL may have for reporting in compliance thereto.
Very truly yours, N.
W. Curtis Vice President-Engineering a Construction Attachment 1 - ITT letter dated December 7, 1979 Attachment 2 - ITT letter dated December 6,
1979 ARS:mcb cc:
Mr. Victor Stello (15)
Director-Office of Inspection 6 Enforcement U. S. Nuclear Regulatory Commission Washington, D.C.
20555 Mr. G. McDonald, Director (1)
Office of Management Information
& Program Contzol U.
S. Nuclear Regulatory Commission Washington, D.C.
20555 Mr. Robert M. Gallo U. S. Nuclear Regulatory Commission P.
O. Box 52 Shickshinny, Pennsylvania 18655