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MONTHYEARML19256C5901979-05-18018 May 1979
PNO-79-118:hydraulic Snubbers Failed to Meet Bleed Rate Criteria.Probable Cause Is Air Contamination in Snubbers. Licensee Plans to Test & Repair All Snubbers
Project stage: Other
ML20005B2121981-06-29029 June 1981
Responds to NRC 801120 Request Re Application for License Amend to Incorporate Tech Specs Revisions Re Snubber Surveillance.License Commitment to Ansi/Asme Std Program Should Be Acceptable Alternative to License Amend
Project stage: Request
ML13330A4261981-12-24024 December 1981
Forwards Amend 102 to License DPR-13,consisting of Proposed Change 105 to Modify Existing Tech Specs to Be Consistent W/Sts
Project stage: Request
ML13326A7041982-09-0808 September 1982
Safety Evaluation Supporting Amend 63 to License DPR-13
Project stage: Approval
ML13326A7051982-09-0808 September 1982
Notice of Issuance & Availability of Amend 63 to License DPR-13
Project stage: Other
ML20067C4071982-11-24024 November 1982
Responds to Re Tech Specs for Snubber Surveillance.All Snubbers Defined in Ansi/Asme OM-4 Std Will Be Listed in Tech Spec Tables in Manner Similar to Current Table on Hydraulic Snubbers
Project stage: Other
ML20105B9341983-06-28028 June 1983
Requests Extension Until 830801 to Submit Revised Tech Specs for Snubbers,Due to Extensive Internal Review
Project stage: Other
ML20077G8181983-08-0101 August 1983
Extends Submittal Date for Proposed Tech Specs on Snubber Surveillance to 830901,to Allow for Resolution of Util Nuclear Review Board Comments
Project stage: Other
ML20077M1361983-09-0101 September 1983
Proposed Changes to Tech Specs 3.7.7 & Table 3.7-3 Re Snubber Surveillance to Include Mechanical Snubbers W/ Schedules,Actions & Acceptance Criteria for Sample Testing
Project stage: Request
ML20077M1341983-09-0101 September 1983
Application for Amend to License NPF-3,revising Tech Specs 3.7.7 & Table 3.7-3 Re Snubber Surveillance to Include Mechanical Snubbers W/Schedules,Actions & Acceptance Criteria for Sample Testing.Safety Evaluation Encl
Project stage: Request
ML20077M1301983-09-0101 September 1983
Forwards Application for Amend to License NPF-3,revising Tech Specs 3.7.7 & Table 3.7-3 Re Snubber Surveillance to Include Mechanical Snubbers W/Schedules,Actions & Acceptance Criteria for Sample Testing.Class III Fee Encl
Project stage: Request
ML20101T4441985-01-30030 January 1985
Proposed Tech Specs,Revising Hydraulic & Mechanical Snubber Surveillance Program,Including Changes to Visual & Functional Tests of safety-related Snubbers & Maint of Equipment & Surveillance Records
Project stage: Other
ML20101T4241985-01-30030 January 1985
Application for Amend to License NPF-3,revising Tech Specs 3.7.7,4.7.7 & 6.10.2.m Re Mechanical & Hydraulic Nuclear safety-related Snubbers
Project stage: Request
ML20137M8701986-01-22022 January 1986
Notifies That Application to Amend License NPF-3,authorizing post-transient Insp of Hydraulic & Mechanical Snubbers Will Be Submitted by 860228.Understanding That 850130 Application Will Be Approved by 860215 Confirmed
Project stage: Request
ML20140F9071986-03-26026 March 1986
Informs That Deletion of Footnote 6 & Addition of within Specified Range to Proposed Surveillance Requirements 4.7.7.2b & 4.7.7.2c.2,respectively,will Be Incorporated Into Apr 1986 Amend Application,Per NRC 860324 Request
Project stage: Other
1983-06-28
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PRELIMINARY NOTIFICATION May 18, 1979 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURREMCE--PN0-79-118 This preliminary notification constitutes EARLY notice of an event of POSSIBLE saft+v or public interest significance.
The information presented is ss initially received without verification or evaluation
_and is basiciily all that is known by IE staff on this date.
Facility:
Toledo Edison Company, Davis-Besse, Unit 1 (DN 50-346) Oak Harbor, Ohio
Subject:
INOPERABLE HYDRAULIC SNUBBERS The RIII onsite inspector notified the region today that, of 97 Grinnell hydraulic snubbers tested to date, 68 have failed to meet the acceptance criteria for bleed rate and/or lockup.
Of the snubbers tested, two-thirds were tested by Grinnell.
There are 254 safety-related snubbers in the plant.
The major problem is a low bleed rate.
Grinnell attributes the low bleed rate primarily to air contamination in the snubbers.
The air conta.wination has been tentatively traced to fabrication and original installation techniques.
The licensee is planning to test and repair, as required, all safety-related snubbers.
The licensee is also re-evaluating the acceptance criteria.
Current criteria for bleed rate (for snubbers rated at less than 50,000 pounds) is 3-8 inches per minute and lockup is 6-20 inches per minute.
RIII will continue to follow this matter to resolution, f;either the licensee nor RIII intends to issue a press release.
The State of Ohio is being notified.
f;RC, Region III, Chicago, received notifications of this information from the Onsite Inspector at 11:30 a.m., May 18,1979.
Contact:
F. Nolan, IE x23019; S. Bryan, IE x28019 Distribution:
Transmitted H St Ll W 7 Cnairnan Hendrie Commissioner Bradford S. J. Chilk, SECY Comnissioner Kennedy Commissioner Ahearne C. C. Kammerer, CA Commissioner Gilinsky ACRS (For Distribution)
Transmitted: MNBB Li Ur P. Bldg Li 50 J. G. Davis, IE-L. V. Gossick, EDO H. R. Denton, NRR Region i i r Ll c/5 H. L. Ornstein, ED0 R. C. DeYoung, NRR J. J. Fouchard, PA R. J. Mattson, NRR N. M. Haller, MPA V. Stello, NRR (MAIL)
R. G. Ryan, OSP R. S. Boyd, NRR J. J. Cummings, 0IA H. K. Shapar, ELD SS Bldg T 53 R. Minogue, SO W. J. Dircks, NMSS S. Levine, RES
}447 lb-)
PRELIMINARY NOTIFICATION 7910100 h [
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