ML20147F720
| ML20147F720 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 02/29/1988 |
| From: | Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| 87-705C, IEB-87-002, IEB-87-2, NUDOCS 8803080021 | |
| Download: ML20147F720 (4) | |
Text
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
e VIRGINIA ELECTRIC ann Powen COMPANY RIcianoNn,VIHOINIA 2 0 0 61 W.L STEWART x S'll'o"',","..
February 29, 1988 U. S. Nuclear Regulatory Commission Serial No.
87-705C Attention: Document Control Desk NA/DBR Washington, D. C.
20555 Docket Nos.
50-338 50-339 License Nos. NPF-4 NPF-7 Gentlemen:
VIRGINIA ELECTRIC AND POWER COMPANY NORTH ANNA POWER STATION UNITS 1 AND 2 SUPPLENENTAL RESPONSE TO NRC COMPLIANCE BULLETIN 87-02 As committed to in our letter of January 18,1988 (Serial Number 87-705A), we have evaluated our current procedures and practices to determine if any further actions need to be taken to assure compliance with fastener specifications and requirements.
Based on this review, we are implementing several program enhancements.
First, we will be developing a standardized purchasing specification for fasteners. The development of this specification should result in a reduction in the number and types of fastener materials stocked.
The new specification is also expected to facilitate the review of purchase order paper work (i.e.,
Certified Hill Test Reports and Certificate of Conformance) against the appropriate ASTM /ASME specification.
The standardized purchase specification for fasteners will be developed by September 30, 1988.
We have identified some areas for improvement in our storage practices and developed a plan for addressing them. Warehouse supervision will be providing additional training for stores personnel on the requirements of storage procedures.
Additionally, we are evaluating our purchasing and storage procedures and will implement appropriate enhancements identified during this additional evaluation. These activities will be completed by April 30, 1988.
Finally, after further review, we find that the evaluation of test results presented in Section 4.2 of Enclosure 2 of our January 18, 1988 response to Bulletin 87-02 requires clarification.
For sample NPF4-AO, a review of specification ASTM A-193 Gr. B8M (Class 1) shows that 100 Rb is an acceptable hardness for material 3/4" and smaller in diameter.
The table in Attachment 2 of our response should not have flagged this parameter as being out of specification.
l 8803080021 880229 PDR ADOCK 05000338 0
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Our current evaluation of this sample is that although elongation is out of specification (24% vs minimum of 30%), all other mechanical and chemical properties were within specification and, as a result, the lower elongation is considered to be insignificant.
However, the fasteners representative of sample NPF4-A0 have been removed from stock.
Sample NPF4-AP was ordered and supplied to the requirements of Class 2 material rather than Class 1.
The.
test results meet the requirements for Class 2, and therefore, the sample is fully acceptable.
The remaining supply of these fasteners were returned to stock.
The attachment to this letter reflects these changes and is meant to replace Attachment 2 in our January 18, 1988 response.
Should you have any questions regarding this information, please contact us.
Very truly yours, O
W. L.
ewart Attachment cc:
U. S. Nuclear Regulatory Commission 101 Marietta Street, N.W.
Suite 2900 Atlanta, GA 30323 Mr. J. L. Caldwell NRC Senior Resident Inspector North Anna Power Station
WORT 2 ANNA POWER STATION Table Page 1 D:ta 27-Feb-88 hk Rockwell Nardness Average Min. of 2 Measurements' Tensile Properties
% Reduc-Chemical Analysis Post Heat Ultimate Yield Elong-tion of.
10 No.
Initial Treatment (Kst)
(Ksi) ation Area C
Mn P
S Si Cr Ni Mo V
ASTM A-193 Gr 87 Standard N/A N/A 125 105 16 min
.37.49.65-1.10.035 max.040 max 0.15-0.35.75-1.20 N/A.15.25 N/A NPF4-AB*
N/A N/A 151 142
- 12 58 0.40 1.00 0.026 0.024 0.24 1.01 0.20 NPF4-AC*
N/A N/A 149 138
- 15 64 0.42 0.93 0.021 0.023 0.22 1.01 0.21 NPF4-AD N/A N/A 149 144 16 56 0.40 0.99 0.023 0.023 0.22 1.04 0.21 hPF4-AE*
N/A N/A 152 137
- 12 57 0.40 1.00 0.020 0.021 0.23 1.05 0.21 NPF4-AF N/A N/A 147 138 19 58 0.40 0.99 0.024 0.020 0.25 1.02 0.20 NPF4-AN N/A N/A 157 144 17 54 0.42 0.90 0.023 0.019 0.25 0.99 0.20 NPF4-Al N/A N/A 131 112 22 59 0.41 1.00 0.021 0.023 0.29 1.03 0.20 NPF4-AJ N/A N/A 138 119 18 64 0.41 0.90 0.016 0.015 0.23 0.86 0.21 NPF4-AK N/A N/A 139 120 18 59 0.40 0.96 0.024 0.021 0.28 1.03 0.22 NPF4-AL N/A N/A 144 126 18 59 0.41 0.99 0.020 0.024 0.22 0.97 0.21 NPF4-AM N/A N/A 139 123 19 55 0.42 0.92 0.019 0.020 0.26 1.03 0.20 NPF4-AN N/A N/A 147 131 19 61 0.41 0.99 0.025 0.021 0.23 0.92 0.21 ASTM A-193 B16 Standard N/A N/A 125 105 18 min
.36.37
.45.70.035 max.040 max
.15.35.80-1.15 N/A.50.65.25.35 NPF4-AR*
N/A N/A 129 118
- 16 63 0.40 0.63 0.022 0.017 0.23 0.90 0.505 0.275 NPF4-AS*
N/A N/A
- 123 115 22 67 0.41 0.62 0.016 0.015 0.27 0.84 0.511 0.259 ASTM A-325 Type 1 (Product Analysis Chemistry Ranges)
Stand. 24-35 Re 120 N/A
.27 min
.47 min.048 max.058 rex N/A N/A N/A N/A N/A NPF4-AT 35 Rc N/A 168 0.42 0.96 0.020 0.022 NPF4-Au 31 Rc N/A 149 0.41 0.80 0.027 0.026 NPF4-AV 33 Rc N/A 148 0.!3 0.77 0.019 0.017 NPF4-AW 31 Rc N/A 151 0.32 0.72 0.022 0.011 ASTM A-193 Gr B8M, class 1 Stand.
96Rb max N/A 75 30 30 min 50 min
.08 mex 2.0 max.045 max.030 max 1.00 max 16.0-18.0 10.0-14.0 2.0-3.0 N/A NPF4-AQ 85 Rb N/A 91.0 47.4 48 73 0.07 1.55 0.010 0.016 0.44 17.56 11.0 2.1 ASTM A-193 Gr B8M, class 1 Stand.
100Rb max N/A 75 30 30 min 50 min
.08 max 2.0 max.045 mex.030 max 1.00 max 16.0-18.0 10.0-14.0 2.0-3.0 N/A NPF4-AO* 100 Rb N/A 111 88.0
- 24 68 0.07 1.58 0.009 0.022 0.35 16.39 10.3 2.3 ASTM A-193 G.- B8M, class 2 Stand.
35Rc men N/A 110 95 15 min 45 min
.08 max 2.0 max.045 max.030 max 1.00 max 16.0-18.0 10.0-14.0 2.0-3.0 N/A NPF4-AP 105 Rb N/A 134 1 04 16 59 0.07 1.69 0.012 0.022 0.52 17.04 11.8 2.1 S
NORT:3 ANNA POWER ST?. TION Tablo Page 2 DLts 27-Feb-88 7
Rockwell Hardness Average Min. of 2 Measurements Tensile Properties
% Reduc-Chemical Analysis Post Neat Ultimate Ylef d Elong-tion of 10 No.
Initial Treatment (Kst)
(Ksi) ation Area C
Mn P
S Si Cr Ni Mo V
ASTM A-194 Gr 8 Stand.60-105 ab N/A N/A N/A
.08 max 2.00 max.045 max.030 max 1.00 max 18.0-20.0 8.0-10.5 N/A N/A NPF4-AX 74 Rb N/A N/A N/A N/A N/A 0.07 1.06 0.011 0.010 0.56 18.6 9.4 NPF4-AY 71 Rb N/A N/A N/A N/A N/A 0.07 1.06 0.016 0.014 0.58 18.4 9.2 NPF4-BM 88 Rb N/A N/A N/A N/A N/A 0.08 1.26 0.009 0.006 0.59 18.5 8.6 ASTM A-194 Gr 2N stand. 24-38 Rc 89 Rb min N/A N/A
.40 min N/A.040 max.050 max N/A N/A N/A N/A N/A NPF4-AZ 30 Re 23 Rc N/A N/A N/A N/A 0.41 0.025 0.017 NPF4-BA 31 Rc 27 Rc N/A N/A N/A N/A 0.40 0.025 0.022 NPF4-B8 28 Re 24 Rc N/A N/A N/A N/A 0.44 0.019 0.023 NPF4-BE 34 Rc 27 Re 4/A N/A N/A N/A 0.44 0.029 0.024 NPF4-BF 28 Rc 27 Rc M8*
N/A N/A N/A 0.46 0.031 0.035 NPF4-BG 33 Re 23 Rc N/A N/A N/A N/A 0.44 0.028 0.022 MPF4-81 29 Rc 23 Rc N/A N/A N/A N/A 0.44 0.027 0.025 NPF4-sJ 26 Rc 26 Rc N/A N/A N/A N/A 0.43 0.024 0.020 NPF4-8L 27 Re 25 Rc N/A N/A N/A N/A 0.46 0.023 0.027 NPF4-BM 27 Rc 22 Rc N/A N/A N/A N/A 0.47 0.028 0.023 NPF4-BP 29 Rc 23 Rc N/A N/A N/A N/A 0.45 0.023 0.028 NPF4-SQ 26 Rc 22 Rc N/A N/A N/A N/A 0.42 0.020 0.027
- $TM A-194 Gr 7 Stand. 24-38 Rc 94 Rb min N/A N/A
.37.49
.65-1.10
.04 max.04 max
.15.35.75-1.20 N/A.15.25 N/A NPF4-BC 33 Re 26 Rc N/A N/A N/A N/A 0.39 0.80 0.02 0.02 0.31 0.80 0.21 NPF4-BN 30 Rc 98 Rb N/A N/A N/A N/A 0.38 0.78 0.02 0.02 0.26 0.75 0.20 MPF4-Bo 29 Rc 21 Rc N/A N/A N/A N/A 0.40 0.87 0.03 0.02 0.26 0.84 0.21 ASTM A-194 Gr BM Stand.60-105 Rb N/A N/A N/A
.08 max 2.00 max.045 max.030 max 1.00 max 16.0-18.0 10.0-14.0 2.0-3.0 N/A NPF4-BC 85 Rb N/A N/A N/A N/A N/A 0.08 1.50 0.009 0.009 0.42 17.0 10.7 2.1 NPF4-BD 95 Rb N/A N/A N/A N/A N/A 0.07 1.34 0.013 0.011 0.50 17.2 11.0 2.2 O