ML20083J173
| ML20083J173 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 01/03/1984 |
| From: | Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | Bishop T, Bishop Tw NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| ANPP-28539-BSK, DER-82-80, NUDOCS 8401160226 | |
| Download: ML20083J173 (3) | |
Text
',. y j 3
MG!cpp, P.ECCWO Arizona Public Service Company ft:
P o. BOX 21666 + PHOENIX. ARIZONA 85036 3 0.lf?! - 9
[" l: r;g January 3, 1984 ANPP-28539-RSK/TRB
%,;i. 9 e,
U. S. Nuclear Regulatory Commission Region V Creekside Oaks Office Park 1450 Maria Lane - Suite 210 Walnut Creek, CA 94596-5368 Attention: Mr. T. W. Bishop, Director Division of Resident Reactor Projects and Engineering Programs
Subject:
Interim Report, Revision 1 - DER 82-80 A 50.55(e) Potentially Reportable Deficiency 'telating to Installed Conax Electrical Penetrations Low Insulation Resistance Does Not Meet Qualification Test.
File: 84-019-026; D.4.33.2
Reference:
A) Telephone Conversation between T. Young and G. Duckworth on December 17, 1982.
B) ANPP-22736, dated January 17, 1983 (Interim Report)
C) ANPP-23642, dated May 3,1983 (Time Extension)
D) ANPP-27619, dated August 23, 1983 (Time Extension)
Dear Sir:
The NRC was notified of a potentially reportable deficiency in Reference (A) an Interim Report was transmitted by Reference (B), and Time Extensions were requested in Reference (C) and (D). At that time, it was estimated that a Final Report would be available by January 26, 1984.
Due to the extensive investigation and evaluation required, a revised Interim Report is attached.
It is now expected that this information will be finalized by March 2, 1984, at which time a complete report will be submitted.
Very truly yours (l
Cs Q
/\\ L E. E. Van Brunt, Jr.
APS Vice President Nuclear Projects Management ANPF :.roject Director EEVB/TRB:ru Attachment d
ec:
See Page Two
~ 8401160226 840103 h
l PDR ADOCK 05000520 ll g S
pon
_ f,.
l Mr.'T. W. Bishop DER' 82-80 Page Two a
ec:
Richard DeYoung, Director Office of Inspection and Enforcement U. ' S Nuclear Regulatory Commission Washington, D. C. 20555 T. G. Woods, Jr.
G. C.'Andognini J. A. Roedel
.D. B. Fasnacht A. C. Rogers.
B. S.. Kaplan~
W. E. Ide J. Vorees J. R. Bynum D. D. Green P. P. Klute A. C. Gehr W. J. Stubblefield W. C.' Bingham R. L. Patterson R. W. Welcher R. M. Grant D. R. Hawkinson L. E. Vorderbrueggen G. A. Fiore111
.S.
P.. Frost J. Self D. Canady Records Center Institute of Nuclear Power Operations 1100 Circle 75 Parkway, Suite 1500 Atlanta, GA 30339-v e..
,, _..,.. - ~,., - - -
r-,,,
-~e,,,
y, w
s L, y,
=-
x c m,
,G, M
q.
3 t
a:
1
'Et i
A
+
IINTERIINiREkORT:- DER 82-80, Rev l'
N
. POTENTIAL' REPORTABLE DEFICIENCY
-g
-ARIZONA ~PUBLIC SERVICE-COMPANY'(APS)
PVNGS' UNITS 1, 2, &~3 1.
Potential Prchlem
} Specification'13-EM-035A_ requires that Electrical Penteration
~
L (Assemblies (EPA)"be qualified to IEEE standard 317-1976.;
21 L Section 5.2 of IEEE 317-76 ' requires that the instrumentation
+ ' circuits -in EPA be: designed to meet the _ requirements of the instrumentation system in _which they are used.
LNeview of qualification reports for terminal blocks supplied by Conax Corporation has revealed substantially low insulation resistance values during' the design basis event simulation tests.
Low: level.. signals -(up to a. maximum 48VDC and 4-20 ma range) cannot 1'
tolerate this -low insulation resistance condition. This could result in erroneous control functions that may jeopardize reliable 1
plant operation under.an accident condition.
II. ; Approach To and Status of Proposed Resolution
'An-investigative. teit was conducted by Conax Corporation on unaged
. terminal block' samples' simulating actual service and installation
- conditions with' transmitters installed.. Details of this test are i given in. Conax Report #IPS-1011.2 '(Bechtel Log No. 'E035A-566-1).
'Similar-testing was performed'on aged samples, in November 1983.
The results of the testing performed by Conax on Kulka terminal blocks lduring the. November: test' period,; revealed that the terminal blocks failed performance' qualification.for the installation 1
2 condition on transmitters and RTD's.
The Kulka terminal blocks
~ qualifications,may.be adequate for. thermocouple applications.
- Therefore, Bechtel has requested Conax' to conduct testing on Raychem Esplices 'as an alternate _for the Kulka terminal blocks with regard to
' transmitter and RTD' installations. This new program is forecast to be conducted from December 1983 to January 1984.
O III. Projected Completion of Corrective Action and Submittal of the Final r
Report Evaluation of this cond'ition and submittal of the Final Report is iforecaststo be completed by. March 2, 1984.
o-
~
~ _
i L -
t.-
2 n
E j.