ML18143B621
| ML18143B621 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 09/20/1985 |
| From: | Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | Harold Denton, Varga S Office of Nuclear Reactor Regulation |
| References | |
| 85-574, TAC-57525, TAC-57526, NUDOCS 8509260238 | |
| Download: ML18143B621 (6) | |
Text
e VIRGINIA ELECTRIC AND POWER COMPANY
- RICHMOND, VIRGINIA 23261 W. L. STEWART VICE PRESIDENT NucLEAR OPERATIONS September 20, 1985 Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation Attn:
Mr. Steven A. Varga, Chief Operating Reactors Branch No. 1 Division of Licensing U. S. Nuclear Regulatory Commission Washington, D. C. 20555 Gentlemen:
VIRGINIA ELECTRIC AND POWER COMPANY SURRY POWER STATION UNIT NOS. 1 AND 2 ASME SECTION XI RELIEF REQUEST Serial No.
NO/ETS:acm Docket Nos.
License Nos.85-574 50-280 50-281 DPR-32 DPR-37 Virginia Electric and Power Company (VEPCO) letter, Serial No.85-208, dated April 15, 1985 was the submittal of a relief request for Surry Power Station. Relief was. requested from the requirements of ASME-Section XI pertaining to the replacement of certain components in the boric acid transfer system.
VEPCO's June 10, 1985 letter, Serial No.
85-208A, submitted additional information requested by Mr.
Edward Girard by telephone from Mr. R.
H. Coupe, Surry Power Station Engineering.
The NRC, in a letter dated July 24, 1985 requested additional information in order to complete the review.
The following information is provided in response to the NRC request.
NRC Request for Information No. 1:
In the first enclosure to your April 15, 1985 lett~r, under the heading "Reason for Request," you state that the filter vessels for the boric acid.
transfer system were originally contracted to the requirements of ASME Section III, 1968 edition. Please state whether any code addenda to the 1968 edition were applicable.
Response
VEPCO is still attempting to locate the original Purchase Specification for the AMF Cuna filters which were originally installed in the plant.
Accordingly, we have not been able to verify if any addenda were applicable to the ASME Section III, 1968 edition. *
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r: *0509200238 s0~g~gao0 PDR ADOCK PDR p
e VIRGINIA. ELECTRIC AND PowER COMPANY To Mr. Harold R. Denton Stone & Webster evaluated the Boric Acid filters.
applicable addenda.
The applicable addenda did not the original and current code Their evaluation, included conclusion was that any of impact the evaluation results.
NRC Request for Information No. 2:
requirements for any potentially the potentially In the enclosures to your April 15, 1985 letter, you indicat~d that an evaluation was made comparing the code for the original filter vessels with the code you proposed for the new vessels.
Provide a copy of the comparison, item by item, not just your conclusions.
Response
Table I, attached,. lists the additional requirements above ASME VIII, 1968, which ASME III, 1968 imposes on Class C-vessels.
This Table indicates how the new ASME VIII filters fulfill these requirements.
The evaluation has used both the 1968 summer and winter addenda.
NRC Request for Information No. 3:
The Stone and Webster Engineering Corporation "evaluation" letter enclosed with your April 15, 1985 letter, noted a difference in allowable stresses for Type 304 stainless steel between the original filter vessel code and the code requested for the new vessels.
The Stone and Webster letter proposed that your purchase requisition should include a specific requirement to account for this change.
Indicate whether you have included the proposed requirement in your requisition.
Response:*
The recommendation by Stone and Webster that the purchase order include specific wording to account for differences in the allowable stress for Type 304 SS was followed.
P.O. #IP-69503 was reviewed and the proposed wording has been verified.
VIRGINIA ELEcTRic AND PoWER COMPANY To Mr. Harold R. Denton If you have any questions or require additional information, please contact us.
Very truly yours, l<j +Jra,J.,,d ~
f W. L. Stewart.
Enclosure:
Table I cc:
Dr. J. Nelson Grace Regional Administrator NRG Region I I Mr.. Donald Burke Senior. Resident Inspector Surry Power Station
N-2111 N-2112 N-2113 ASHE III 1968 The requirements of Section VTTI of the Code shall Apply to the materials, rlesign, fahrication, inspection, and testing, and cPrtification of Class C vessels except that the following addi-tional requirements shall apply.
Par. U-l(g) of Section VIII shall not apply to Class C vessels.
This paragraph addresses exemption from Coclr.
stamping.
Par. UW-2(a) of Section VIII shall apply to any Class C vessels con-taining radioactivity.
2601-1493705-BlV TABLE I REQUIREMENTS FOR CLASS C VESSF.LS ASHE I~ SUJ!SECTIQ~, ARTICJ.E 21 i':ASHE III, 1968 Winter Addenda N/A Par. U-l(h) of Section VIII, Div. 1 of the Code shall not apply.
This paragraph addresses exemption from inspection.
a)
All welded joints of Cat. A shall be Type 1 of Table UW-12.
b)
All welded joints of Cat. B&C shall be Type 1 or 2 of Table UW-12.
Resolution of Additional Require11_1_~-~~
The new Cuno filters are considered replarements and shall meet the require-mPnts of ASHE XI, Article IWA-7200 (C) which allows use of latter erlltion of the~
Construction Code.
Based on Table 1 and ~
the purchase order requiremPnts, the requirements of ASHE XI suharlic1e 7200(C) is met with the exception that ASMF. VIJT is used in lien of ASHE III (the original Construction Code).
Par. U-l(g) has not been applied.
The new Cuno filter is stamped.
Par. U-l(h) has not been applied.
All final welds were liquid penetrnnt insperted.
ASHE VIII, 1983, requires all Cat. D joints to be full penetration welds extending through the entire thickn~ss of the vessel or nozzle walls.
This is a more stringent requirement.
e
N-2114 N-2115 N-2115 ASHE III 1968 Class C vessels shall be stamped with the Jetter "N" below the Code U-symbol in the stamping shown in Fig. UG-118 of Section VI II.
- ASHE III, 1968 Winter Addenda Radiographic Examination All welded joints of categories A, R, C, and D joints which are bntt welds where either of the joined memhers at the weld exceeds 3/16 in. in thickness shall be radiographically examined in accor-dance with the requirements of UW-51 except that categories C and D joints of two inches or less nominal pipe size need not be radi ogra-phed.
J,iqnid Penetrant or Magnetic Particle Examination a)
All welded joints of Cate-gory Dover two inch nominal pipe size which are not hutt welds shall be examined by magnetic particle or liquid penetrant methods at the root of the weld-after hack chipping or after removal of hacking ~ings and on Added Division 1.
- Summer Addenda 1968 did not effect Article 21.
2601-1~q31os-n1v Reso_!_!Jtion of Additional Requirements In compliance.
All circumferential and longitudinal welded joints 'were specified to he radiographed.
All final welds were spec~fied to he liquid penetrant inspected.
Since the vessel was fabricated to ASHE VIII in lieu of ASHE III, no "N" Stamp is required.
N-2114 ASHE Ill 1968 Par. UG-125 through UG-134 of Section Vlil shall not apply and the requirements of Article 9 of this section shall be substituted.
Article 9 - Protection Against Overpressure.
2601-1493705-RlV
- ASMF. UT, 1968 Winter Addenda c) All joints of Cat. D shall be full penetration welds ex-tending through the entire thickness of the vessel wall or the nozzle wall except that those joints of 2 inches or less nominal pipe si~e may be of the acceptable types of Fig. UW-16.1.
Resolution of Additional Re~i rements
- Review of manufacturer's drawing indi-cates dl Cat. D joints on the nPw
- vessel are full penetration welds.
No pressurP relief devi.ce waR included as part of the replacement.