ML17209A887

Forwards Requirements for Preservice Insp & Testing of Snubbers.Written Confirmation of Intent to Comply W/Encl Requirements Required within 30 Days

ML17209A887
Person / Time
Site:	Saint Lucie
Issue date:	03/27/1981
From:	Tedesco R Office of Nuclear Reactor Regulation
To:	Robert E. Uhrig FLORIDA POWER & LIGHT CO.
References
NUDOCS 8104010831
Download: ML17209A887 (6)

Text

NR 37 198)

Docket No.:

60-389 1 <('/17w lee'

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Dear Dr. Uhrig:

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Florida Power 8 Light Company...,....,

ATTN:

Dr. Robert E. Uhrig,,Vice President,,,

Advanced Systems 8 Technology,,....

P. 0, Box 629100 Miami, Florida 33162 DISTRIBUTION:

-Docket File bcc:

LB¹1 Rdg TERA DEisenhut PDR JYoungblood LPDR VNerses NSIC MRushbrook TIC RTedesco ACRS (16)

EHemminger RJKiessel SHanauer RVollmer TMurley DRoss RHartfield, MPA OELD OIE (3)

Subject:

Preservice Inspection,.,and, TestinIg,yf Snybbers - St. Lucie Plant, Unit 2 Licensee Event Reports on the,subjeqt,of, inoperable agd incorrectly installed snubbers has firmly revealed a lpjghistjry. of, snubber, problems..

We,, have,,

r equested that all applicants whq <oil,l commence pje-operatioqal,testina to ensure snubber operability by meeting the.enc'loped requirements as a minimum.

Within 30 days of receipt of this l,etter~ please,advi.se,us of. your intent to comply with our requirements as specifjed,in the.,enc1osure.

Sincerely,

Enclosure:

As stated 4 <> t l

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~ 0 y/t Robert L. Tedesco, Assistant Director.

for Licensing Division of Licensing cc:

See next page

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Dr. Robert E. Uhrig, Vice President Advanced Systems and Technology Florida Power 5 Light Company'.

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Box 529100 Miami, Florida 33152 CC:

Harold F. Reis, Esq.

Lowenstein,

Newman, Rei,s, Axelrad 5 Toll 1025 Connecticut

Avenue, N.

W.

Washington, D.

C.

20036 Norman A. Coll, Esq.

McCarthy, Steel',

Hectory 5 Davis 14th Floor, First National Bank Building Miami, Flori da 33131 Mr. Martin H. Hodder 1131 N.

E.

86 Street Miami, Florida 33138 Dr. David L. Hetrick Professor of Nuclear Engineering The Univ'ersity of Arizona Tucson, Arizona 85721 Dr. Frank F. Hooper School of Natural Resources University of Michigan Ann Arbor, Michigan 48104 Resident Inspector St. Lucie Nuclear Power Station c(o U.

S. Nuclear Regulatory Commission P. 0.

Box 400 Jensen, Beach, Florida 33457 Edward Luton, Esq.,

Chariman Atomic Safety 8 Licensing US Nuclear Regulatory Commission Washington, DC 20555

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'V 210.0 Material s EngineeringMianch

'10.1 Due to a long history of problems dealing with inoperable and incorrectly installed snubbers, and due to the potential safety significance of failed snubbers in safety related systems and components, it is. requested that maintenance records for snubbers be documented as follows:

Pre-service Examination.

A pre-service examination should be made on all snubbers listed in tables 3.7-4a and 3.7-4b of Standard Technical Specifications 3/4.?.9 This exami-nation should be made after snubber installation but not more than six months

'rior to initial system pre-operational

testing, and should as a mimimum veri'fy the following:

(1)

There are no visible signs of damage or impaired operabilits a

result'f storage, handling, or installation.

(2)

The snubber location, orientation, position setting, and configuration (attachments, extensions, etc.) are according. to desi gn drawings and specifictions.

s (3)

Snubbers are not seized, frozen or jammed.

(4)

Adequate swing clearance is provided to allo'w snubber

>~evement.

(5) If applicable, fluid is to the recommended level and i not 'leaking from the snubber system.

.(6)

Structural connections such as pins, fasteners and other connecting hardware such as lock nuts, tabs, wire, cotter pins are i,nstalled correctly.

Pre-0 erational Testin During pre-operational

testing, snubber thermal movements f: r systems whose peratin tern erature exceeds 250' should be verified as ollows.

g p

(a)

During initial system heatup and cooldown, at 'specific(

temperature intervals for any-system which attains operating temps')ature, verify the snubber expected thermal movement.

(b)

For those systems.which do not attain operating temper,, tu"e, verify via observation and/or calculation that the snubber will accommocate the projected thermal movement.

(c)

Verify the snubber swing clearance at specified heatup and cooldown intervals,.

Any discrepencies or inconsistencies shall be evaluated for cause and corrected prior to proceeding to the next specified int'erval.

If the period between the initial pre-service examination and initial system pre-operational test exceeds six months due to unexpected situations, re-examination of items 1,4, and 5 shall be performed.

Snubbers which are

. installed inc'orrectly or otherwise fail to meet the above requirements must be repaired or replaced and re-examined in accordance with

he above criteria.'

The above describ operability program for snubbe should be included and documented by the pre-.service 'inspection and pre-operational test programs.

The pre-service inspection must be a prerequisite for the pre-operational testing of snubber thermal motion.

This test program should bp <<.'~.ified in Cha,pter 14 of the FSAR.