ML20214R661
| ML20214R661 | |
| Person / Time | |
|---|---|
| Issue date: | 01/12/1987 |
| From: | Aggarwal S, Calvo J, Rosa F Office of Nuclear Reactor Regulation, NRC OFFICE OF NUCLEAR REGULATORY RESEARCH (RES) |
| To: | |
| Shared Package | |
| ML20214R651 | List: |
| References | |
| RTR-REGGD-1.156, TASK-EE-404-4, TASK-RE REGGD-01.XXX, REGGD-1.XXX, NUDOCS 8706080243 | |
| Download: ML20214R661 (4) | |
Text
- _ _ __
DRAFT VALUE/ IMPACT STATEMENT BACKGROUND 1
Heretofore, no guidance specific to the qualification of connection assemblies has been published by NRC.* In September 1985, IEEE issued IEEE Std l 572-1985, " Qualification of Class 1E Coinection Assemblies for Nuclear Power Generating Stations," which provides specific guidance for the qualification of connection assemblies for use in nuclear power plants. This regulatory guide endorses IEEE Std 572-1985 without exceptions.
VALUE/ IMPACT ASSESSMENT Value The standard endorsed by this regulatory guide represents a national consensus on qualification methods to ensure the reliability and function of connection assemblies used in nuclear power plants. It provides a standardized approach so that industry and the NRC staff may have common understanding on connection assembly qualification and testing procedures, thus minimizing related engineering costs by the applicant a.1d review costs for the staff.
Impact This regulatory guide does not impose any new costs or obligations on licensees or applicants. Thus, no adverse impact will result from the issuance of this guide. The guidance was developed through the national consensus stan-dards process and reflects current NRC and industry practice.
^0 raft Ragulatory Guide 1.131, " Qualification Tests of Electric Cables, Field Splices, and Connections for Light-Water-Cooled Nuclear Power Plants," was issued for public comment in August 1977 but not published following public .
comment. l
)
8706080243 870531 j PDR REGQD t 01.XXX R PDR 4 l l
l
R 4
p (This position paper was developed by the NRC staff at the request of the y Committee To Review Generic Requirements. It is reproduced with the draft
$ guide for the information of the public and to request public cmaments.)
i REGULATORY ANALYSIS FOR PROPOSED REGULATORY GUIDE ON ENVIRONPENTAL QUALIFICATION l OF CONNECTION ASSEMBLIES Section 50.49(b)(1) to 10 CFR Part 50 and Regulatory Guide 1.89 reouire that all safety-related electric equipment must be qualified. These documents provide general requirements, direction, and acceptable methods for qualifying safety-related electric equipment.
l l Regulatory Guide EE 404-4, which endorses IEEE Std 572-1985 without excep-tions, provides specific guidance to comply with Section 50.49 and R.G.1.89 j with respect to the environmental qualification of connection assemblies.
k Section 5.0 of IEEE Std 577-1985 requires that a "oualified life" should be i established for connection assemblies. This is the same requirement as in Section50.49(e)(5).
- Sections 5.1, 5.2, 5.3, 5.4, & 5.5, of IEEE Std 572-1985 provide five methods l
of qualification, namely
- 1. Qualification by type testing O 2.
3.
4 Qualification by operating experience Qualification by analysis Ongoing qualification j 5. Combination of any one or more of the above. '
a These methods of qualification do not impose requirements beyond those specified in Section 50.49 (f) and R.G. 1.89.
1 i Section 6.1 of IEEE Std 572-1985 requires certain cualification specifica-4 tions; namely, connection assembly descriptions, applicable codes, service conditions, performance requirements, acceptance criteria, and applicable '
t margins. These requirements are the same as those covered by Section 50.49 (d)(1) and R.G. 1.89.
Section 6.2.4 of IEEE Std 572-1985 prescribes functional tests. These tests are: ,
l
- 1. Conductor continuity l
- 2. DC resistance of each circuit within the connection assembly
- 3. Insulation resistance measurements i 4 Dielectric withstand voltage test J 5. Connector disconnect test
- 6. Mechanical loading (e.g., vibration, flexing)
- 7. Nonseismic vibration
- O These are prescriptive requirements (the general requirements- are covered by Section 50.49 (d)(2) and R.G.1.89), and are for basic functional performance tests which can be performed by using _ readily available instruments such as
- voltmeters and megohnneters, at minimal cost.
}i 5
O Sections 6.2.5 & 6.2.6 of IEEE Std 572-1985 provide methods of age condi-tioning e.g., natural, accelerated age conditioning, radiation aging. These
- methods are the same as those in Section 50.49 (e)(5) and R.G.1.89.
Section 6.2.7 of IEEE Std 572-1985 provides guidance on DBE tests (seismic and LOCA). These requirements are the same as those in Section 50.49, Regulatory Guide 1.89 ard Regulatory Guide 1.100.
Section 8 of IEEE Std 572-1985 deals with documentation requirements. These requirements are consistent with IEEE 323-1974 and R.G. 1.89 and, although somewhat more presc-iptive, impose no requirements beyond those implicit in R.G. 1.89.
Based on our in-depth review of IEEE Std 572-1985, we conclude that IEEE Std 572-1985 does not impose any new significant requirements. The require-ments for prescriptive functional tests described in the IEEE Std are based on existing industry practices, and can be fulfilled at minimal ccst and effort.
Furthermore, the functional performance tests described in IEEE Std 572-1985 are basic, simple and routine. We are, therefore, of the opinion that these tests have been routinely performed by the manufacturers. It cannot be proven, but it is reasonable to conclude, that connection assemblies used in operating plants and NT0Ls have been subjected to functional performance tests described in IEEE Std 572-1985. Thus, this regulatory guide is consistent with current licensing practice.
0 Y E Satish K.Msgarwal ll3f8l
/
Division of Engineering Safety, RES Mk~f@
F. Rosa llI 2ll8 Y Branch Chief NRR:PAEI M '&, 4. 4 -0 ll/7 $Y lvo Branch Chief NRR:PBPE E
~
~
E. Marinos t,$t/f7 Acting Branch Chief l NRR:BWEI l
6 ,,,,,ca c, ni,n.c o,rict.iss7 ist-sen.eocos
r x 1
I UNITED STATES sncat rouarw< tass nAre !
NUCLEAR REGULATORY COMMISSION ' 57^td "c '^'
WASHINGTON, D.C. 20555 J^,5,"deg l l
OFFICIAL BUSINESS i PENALTY FOR PRIVATE USE. 4300 l 12 0 C 5 50 t - r US N dC- d $; , t _" y p 33 I I llCa10P119 '
DIV 0F I a.F 0 SUN SVCS Ok '
D O C U '+ ~ f1 T CONTROL HPANCH 03 UME N T CONTPCL DESK ;
WASHINGTON OC 205C5 I
)
O; i
i I
O
_ _ _ . .__ _ _ _ _ _ _ _ _ _ _ _ _ . . . _ _ _ _ _ _ _ _