ML20126B313

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Responds to Allegations Re Wide Range Nuclear Instrumentation Operability,Operator Attentiveness & Alignment of Reactor Coolant Flow Transmitters
ML20126B313
Person / Time
Site: Millstone Dominion icon.png
Issue date: 01/11/1991
From: Haverkamp D
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
To:
AFFILIATION NOT ASSIGNED
Shared Package
ML20126A943 List:
References
FOIA-91-162 NUDOCS 9212220052
Download: ML20126B313 (18)
v • d • e


Text

-_-__ _ _ _ - _ _ _ _ _

Y-9 m ..

JAN 1 i 1931 s

Docket No. 50-336 File Nos. RI-90-A-180, RI-90-A-198 ct e ton FolA. Ib 1- ---

==Dear

Subject:

==

Allegations Concerning (1) Wide Range Nuclear Instrumentation Operability, (2) Operator Attentiveness, and (3) Alignment of Reactor Coolant Flow Transmitters.

The Region I office has completed its followup in response to the concerns you brought to our attention on October 8,1990 and October 26, 1990 alleging that (1) wide range nuclear instrumentation was not operable as required by technical specifications, (2) personnel were not attentive to duties or were sleeping, and (3) alignmeat of the reactor coolant flow transmitters was not accomplished properly.

We found your allegation concerning the operability of wide range nuclear instrumentation to be unsubstantiated and have documented our findings in NRC inspection report, 50-336/90-22, section 5.3.3. We concluded that at least two of the four instruments were operable during fuel movement, although one channel was spiking.

We also found your allegation concerning two licensee workers who were reportedly found asleep to be unsubstantiated and have documented our findings in section 3.7 of the above noted report. We were unable to confirm that the ,

individuals were inattentive or that they compromised work control. _

Finally, we found your allegation concerning the improper alignment of reactor coolant flow transmitters to be unsubstantiated and documented our findings in section 5.3.1 of the above noted report. We concluded that the alignments were completed adequately although a proposed revision to the alignment procedure provided more detailed instructions for use of an improved test rig.

Copies of the above noted reports are attached for your information. We appreciate your informing us of your concerns and feel that our actions in this matter have been responsive to those concerns. Should you have any additional questions, or if I can of of further assistance in this matter, please call tse collect at (215) 337-5120.

Sincerely, Orivn9105ned By Donald R. Haverkamp, Chief Reactor Projects Section 4A Division of Reactor Projects 0FFICIAL RECORD COPY ALLEGATION COL RI-90-A-0198 - 0001.0.0 01/09/91 9212220052 920608 PDR FOIA CUILD91-162 PDR

I bec/with encl:

J. Stewart (2)

M. Perkins ORC s

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APPEN0ix 4.0 .  ;

SAMPLE RECORD OF ALLEGATION PMEL DECISIONS

$1TE: N)/- i ' /4 - O/ i$ PANEL ATTENDEES:

l ALLEGATION NO.: /77 5 - 2 Chairman - f (Mtg.(J12345) Branch Chief - lA)en a, cc.4 y DATE: to l15 /9 0

! PRIORITY: High Medium Q.,w- Section Chief (AOC) -

SAFETY $1GNIFICANCE: Yes No Unknown Others - 1/ai( ,

1 CONCURRENCE TO CLOSE00T: 00 BC SC No CONFIDENTIALITY GRANTED: Yes

($ee Allegation Receipt Report) /

Yes No i IS THEIR A 00L F]NDING:

15 CHILLlHG EFFECT LETTER WARRANTED: Yes No l Yes No HAS CHILLING EFFECT LETTER BEEN SENT:

No HAS LICENSEE RESPONDED TO CHILLING EFFECT LETTER:Yes l l ACTION:

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, ALLEGATION RECEIPT REPORT c v / 3 COlvi A11'egation No. l~10d -O/76 (leave blant)

Name: Address: c Phone: City / State / Zip:

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lnformaiibn in this record Y[as deleted i in accordande wit

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hthp F a 'm of Information 1 -

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203 443 BOW i OCi 25 '90 15:06 HRC MILLSTONE OFFICE P01 Q- n l

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OVERTIME AND RCS FLOW ALLEGATION INFORMATION A11eger set internal n. ail on 10/22/90 and inspector aware of 9 issues on 10(25/90. 4..,.

Refer to Memo dated 10/22 :

k i 1. 'This its is addition'al information/ licensee response to

.t speed calibration.

I alleger's Refer to 10/12/90 concerns in fon RCS orma tion.. flow: and 7,i

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2. Self-exp1anatory ,

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3. Overtime Issues -
a. Service Water Gresup (alleger believes is is CNF contractor personnel). g

"{ . b. Alleger received information from a maintenance I mechanic and a maintenance electrician.

c. The inspector identified the source of the alleger's k, , information was a senior reactor operator. The k operator involved was a plant equipment operator with the event occurring app eximately 2-3 weeks ago.

'The inspector plans to ciscuss the specifics with the senaar reactor operator on 10/26. As of 10/25 the 1

operator has a day off. ,

y c. The alleger received this issue from the same senior

, reactor operator. -

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?, 4. Inspector has nothing further to add to this issue.

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j SAMPLE RECORD OF ALLEMTION PANEL DECISIONS

$11E: b ~1 PANEL ATTENDEES:

(A) gai. s At. LEGATION NO.: kl- 90 -M - C 2C 4 Chairu n - il m

DATE: it/u/10 (Mtg.(J/2345) Branch Chief - EcW t PRIORITY: High Medium h Section Chief ( AOC) bi SAFETY $1GNIFICANCE: Yes Others - b rs f 6faq-hh$ '

No(WUnkh

l CONCURRENCE TO CLOSE0VT: 00 (BC/ SC CONFIDENTIALITY GRANTED: Yes No (See Allegation Receipt Report) 15 THEIR A 00L FINDING: Yes No __

Yes No 15 CHILLING EFFECT LETTER WARRAkiED:

Yes No HAS CHILLING EFFECT LETTER BEEN SENT:

Yes No KAS LICENSEE RESPONDED TO CHILLING EFFECT LETTER:

ACTION:

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in accordance with et)d motInfoma Act, exegtion F01A - .

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~ ALLEMTION RECEIPT REPORT l . ,. E' Mv (' $ Ic h d 9 0 nm Awegatson uo.&qb-4-oto P (leave blank)

Name: Address: \

Phone: City / State / Zip:_ .

Confidentiality:

Was it requested? Yes No k' ,

Vas it initially granted? Yes No Was it finally granted by the allegation panel Yes No Does a confidentiality agreement need to be sent to a11eger? Yes No Has a confidentiality agreement been signed? Yes No Memo documenting why it was granted is attached? Yes No e b- Position /

Title:

Facility: /W 5 -L oocket No.: So/33 (Allegation Sumary (brief description of concern (s)[. ') bwhend cSet, dica

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Number of Concerns: I _

Employee Receiving Allegation: bdic /,cM /Mce )$d M b-Iaiur (first two initials and last name)

Type of Regulated Activity a ,y', Reactor (d) _ Safeguards b Vendor (e) ~ Other:

c ~ Haterials (Specify)

Haterials License No (if applicable):

FunctionalArea(s): 'F(a Operations e Emergency Preparedness (b Construction f Onsite Health and Safety (c Safeguards ~g Offsite Health and Safety (d) Transportation h Other:

(NRC Region I Form 207

/ Revised 10/89) . .\

  • Information in this record was deleted -

in accordance with lh Freedom of Informat(on se ,

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l CONCERNS FROM A NORTHEAST EMPLOYEE The res' nt insoector received en internal memorandum dateo The inspector had follow-up discussions on A he clarification of the memorandum with the alleger on

)

Issue The alleger poses concerns and questions on proceduraltion in adequacies and implementation. The proc re and he question are IC 2419C Section 5.5.6. 01 er mocou e (HJTC) alleger was tasked with heater junction reinstallation using IC 242iC.

The specific issues associated with procedure IC 2419C ares

a. IC 2421C step 5.5.6.i requires a visual inspection Notify IC of HJTC connector assemblies on eachThe cable.

alleger said he supervision is damage is apparent.

identified problems with 3 connectors (Zi #4 and #7; Z2

  1. 8). The specific problems with the 8-pin connector was not identified to the inspector, however the alleger notified his immediate upgrade supervisor at the job location. The supervisor notified his

' department head who told the workers to reconnect the HJTC connections. During the work activity a Quality Service Inspector was on location. The inspector asked the alleger if this item was documented in the QSD surveillance form. The alleger did not know.

b. IC 2421C step 5.5.o.1 also requires a visual e:: amination of a grafoil gasket at the Litton Veam connector for signs of degradation. The alleger did :

not know where to look for this item, and therefore ~

auestioned if the procedure should require additional drawings to incluce the location of the grafoil gasket.

Tne alleger's indecencent research identified the locat2cn of the grafo11 gaskets in NUSCo drawing 2500!-39108 sheet 2.

c. No procedure drawing is present to identify connec ors and there location. This task was accomplished by measurement of relative length of cables by the alleger. According to the alleger the cables have etched ID numbers however, their physical location makes it impossible to acquire the numbers.
d. The caution procedure action prior to steo 5.5.6.7 requires the the connectors mate up snug and turn the collar 90 degrees. This action crimps the copper seal and keeps the collar from moving during operation.

According to the alleger, the caution step was recently A 90 PORC approved as a Intent procedure change.

V degree turn from hand tight according to the alleger ~

f rom discussions with NNECo engineering appro: imates to 25 ft-lbs. On October 30, NNECo engineering identified the correct torque value for the connector collar as 31 A l ft-lbs as referenced in a 1986 Combustion Engineering '

1etter. The licensee incorporated-this into the procedure as a non-intent procedural _ change on October

30. The alleger does not believe this change to a ,

caution note in procedure IC2421C as a non-intent change. ,

e. According to the alleger dust covers are installed on the HJTC connectors when disconnected as depicted on procedure figure G.5 of IC2421C. Inspector review of procedure IC 2421C section 5'.5.6 on reconnection of connections did not identify a specific procedural step i

to remove dust covers on the connectors.

1. IC 2421C step 5.6.4 requires verification of HJTC per IC 2419C. The verification per IC 2419C is normally completed prior to reconnection of cable per IC2421C. 1 j

I i Overall, the alleger believes the licensee is not following procedures based on the condition of IC 2421C, or if the procedure is followed no other technicians are identifying the problems and requesting  ;

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resolutions.

INSPECTOR ASSESSMENT l The inspector believes this item should be turned ove to the licensee for response. HJTC connectors are EED components and part of the inadequate core cooling ~ .

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! (ICC, system. R l

ADDITIONAL INFDPMATION l

The allecer heard third hand. that a recent polovee to the l l

t1111 stone 3 IC department was labeled as the/EEEEEEEEEE at l

Millstone 3. The technician recently transfered 1-om the ,

chnical tr '7ing organi:ation. His previousThe position was i

l f ame of the l ~ associated'The with Millstone alleger 2. is f' individual presenting this for use ised on his past H61 issues.

Recommendation: Refer to 01.

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1C 2421C Page 13 Rev.6 g

'5 5.5.5 CEDM Power Cabling 5.5.5.1 Visually inspect the connector assemb'ies on each cable N

for signs of degradation or damage.

a. If the connector must be reworked or replaced, ,j _

reference IC 2421E, Head Area Cable Support l System Connector Assembly Procedure. .,

5.5.5.2 Reconnect the CEDM power cabling at disconnect l panels T323, T326, T333 and T336. Utilize Table 2 l l

and Figure 8.3 to insure proper connections, 5.5.5.3 Reconnect the CEDM power cabling to the CEDM stack on the head. Utilize Table 2 and Figure 8.1 to-locate and identify the appropriate CEA assembly.

5.5.6 HJTC Cabling dwwxwwwwwwwNwwwwwNwwwwwwxwwwNwN q CAUTION t -

The HJTC cabling and connectors are environmentally qualified  ;

) (EEQ) components. Copper seal rings must be installed in the  ;

s G&H connector assemblie: at the probe to mineral cable interface s

& t rest re qua ifi ati n f 11 wint h'ead cable removal.' Seal rine I H(ShM D

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replacement is specifically addressed in the body of the procedure 1 -

( below.  ! -

hww wwwwumwwwwmwwwummwmmm' 5.5.6.l' Visually inspect the cc=ctor assemblies en eac }

for signs of degrad_ation_or_ damage.

~ - . - - . . -

_- m Visually inspect the Graf6il~gE~sk6t at the I~itton Veam ,

connectors for the HJTC cables for signs of .'

. -Megradation 'or damage ._. _

a. Notify the Assistant I&C Supervisor if d[ mage 7s

- - - apparent. -

5.5.6.2 Reconnect the HJTC c$bling at disconnect panels T323, T326, T333 and T336. Utilize Table 2 and-Figure 8.3 to insure proper connections.

g 5.5.6.3 Carefully uncoil the HJTC mineral cables stored in the

// HACSS trays and route the cables to the appropriate t

HJTC probe assembly. Reference Figure 8.4 for HJTC mineral cable routing.

5.5.6.4 Obtain new copper seal rings for the G&H connectors at the probe-to-mineral cable interface.

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a. Seal rings stock code is 50700943 (Comb. Eng.).

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1C 2421C Page 14 Rev. 6 m

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  1. 'E NI: 5.5.6.5 OA HOLD POINT - Visually inspect the copper seal rings to ensure they are clean and free from radial '

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scratches and indentations.

5.5.6.6- QA HOLD POJNT - Install the copper seal ring on the <

G&H receptacle to rest on the seal collar.  !

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Iwo nwr neans - the surface of 1:cth trale and female cwEm g g*[

f \ are z:nted and snug, then turn the threaded collar 90 degrees. ,

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\ niis will c: ring the copper seal and keep the collar fran m:nr.mg \s ,

\. g aurir.g operation. . \

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5.6.7 Carefully mate the G&H connector plug and receptacle,j'

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engage the threads and_ha.nd tighten. - -

5.5.6.8 Repeat Steps 5.5.6.6 and 5.5.6.7 for the remaining HJTC probe connections.

5.5.6.9 QA HOLD POINT - Jnitial and date 1&C Form 2421C-1.

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5.5.6.10 Secure the HJTC mineral cable to the head cable support unistrut using "TEFZEL, TYZ-27M" radiation .

resistant ty-raps. Do not exceed three feet between ty-raps. Ty-wrap stock code is 6?4n0350.

5.6 Cable Verification ,

5.6.1 CEA Position freed Switch) Cable Verification

$'9 5.6.1.1 Energize the +5.140 VDC reed switch power supplies ,

P' and the +28 VDC logic power supplies located in the 14'6" East DC Switchgear Room, CEDS Logic Panel (Reference Table 1 items,11 and 12).

5.6.1.2 Energize the metrascope at Control Room Panel C04F.

'5.6.1.3 Establish Communications between the metrascope and the reactor vessel head cable 5 .

74

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5.6.1.4 Raise and lower the reed swi *est magnet assembly along the side of CEA #1 reed switch shroud.

l 5.6.1.5 Verify that the metrasco'pe display for CEA #1 changes with the magnet position. Record on 1&C Form 2421C-1.

." 5.6.1.6 Repeat Steps 5.6.1.4 and 5.6.1.5 for the remaining reed

/ switches.

[ 5.6.1.7 ]f any reed switch display does not respond correctly,

m IC 2421C Page 15 Rev. 6 f

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5.6.2 CEDM Power Cable Verification 5.6.2.1 Verify that CEDM motor generator output breakers are (

red tagged open.

5.6.2.2 Disconnect the coil power cables identified on l&C Form 2421C-1 for the CEDM under test.

5.6.2.3 Using a 500 volt meggar, test the cables listed on 1&C Form 2421C-1 to ground. Record the "As Found" readings on 1&C Form 2421C-1.

5.6.2.4 If the. values recorded in Step 5.6.2.3 are within specification, record them "As Left". If any values are not within specification, initiate an AWO to investigate and correct the problem.

5.6.2.5 Measure the coil resistances listed on 1&C Form 2421C-1 and record the "As Found" values.

5.6.2.6 If the resistances recorded in Step 5.6.2.5 are within (

the " Desired" values, record them "As Left".

5.6.2.7 If the resistance values are not within tolerance, initiate on AWO to investigate and correct the problem.

C a. 5.6.2.8 Reconnect the coil power cables disconnected in Step 5.6.2.2, initiating the appropriate blocks on 1&C ,

Form 2421C-1.

- 6 5.6.3 Verification of ICI cables is nerformed under SP 2407.

pm #4 Verification of heated junction thermocouple probes is performed !

pr.6 i 5.6.4

]

tg -g. under IC 2419C. ,,

5.7 EEO Maintenance Activities 0 h

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5.7.1 Required EEQ Maintenance activities are identified in 242.10 Attachment 9.1. Assure that these tasks are accomplished during Mf Head Cabling removal and installation.

6. RESTORATION 6.1 Ensure that all data sheets are properly completed.

,6.2 Inform Operations that IC 2421C is complete, e

' 6.3 Ensure that all lifted leads / removed weidmuller pins have been replaced.

7. TABLES l, 7.1 Table 1, Equipment Tag Out

" 7.2 Table 2, Cable Connections

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1C 2421C Page 1 of 2 -

Rev.6 Attachment 9.1 y . ..

. ATT ACHMENT 9.1 t'

EED COMPONENT M AINTENANCE REOUIREMENTS ,

EOUTPMENT: HEAD ASSEMBLY CABLING / CONNECTOR ASSEhBLIES -

(PMMS ID)  :

A. INCORE DETECTOR ASSEMBLY CABLING B. HEATED JUNCTION THERMOCOUPLE ASSEMBLY CABLING , ,

C. HEAD VENT SYSTEM CABLING MANUFACTURER: LITTON VEAM/G&H/KERITE/ITT MODEL NUMBER: REFERENCE IC 2421E FOR SPECIFIC PART NUMBERS ,

SERVICE: A. INCORE DE1 eCTOR ASSEMBLY: CORE EXIT C THERMOCOUPLE INPUT TO INADEQUATE CORE

'd COOLING CABINET (ICC). .

B. HEATED JUNCTION THERMOCOUPLE '

ASSEMBLY: REACTOR VESSEL LEVEL

-MONITORING SYSTEM (RJTC). ,

C. HEAD VENT ASSEMBLY: REACTOR VESSEL i- HEAD VENT SYSTEM.

! ENVIRONhENTAL -

BOUNDARIES: A. HJTC CONNECTORS (G&H) ARE AN INTEGRAL PART OF TrIE MINERAL CABLE ASSEhBLY.

COPPER SEAL RING PROVIDES WATERTIGHT l BOUNDARY BETWEEN MATING CONNECTORS.

B. INCORE DETECTOR AND HEAD VENT

,, CONNECTOR TO FIELD CABLE INTERFACE.

2.

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t^ l IC 242]C Page 2 of 2 --

Rev.6 Attachment 9.1

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ATTACHhfENT 9.1 g

'i EEO COMPONENT M AINTENANC2 REOt3IREMENTS <

.(continued)

MAINTENANCE ,

REOUIREMENIS: A. MF W COPPER SEAL RINGS SHALL BE INSTALLED IN THE HJTC GJ H CONNECTORS EACH TIME THE CONNECTOR IS REMATED.

B. THE HJTC AND ICI THERMOCOUPLE , , ,

ELECTRICAL PENETRATION FIELD CABLE INTERFACE SHALL BE SEALED WITH RAYCHEM WCSF-N.

i MISCELLMJEOUS: 1. CONNECTOR ASSEMBLIES SHALL BE VISUALLY INSPECTED FOR SIGNS OF DEGRADATION OR WATER INTRUSION EACH TIME THEY ARE

'3 g DISCONNECTED _FOR REFUELING ACTIVITIES.

2. IF CONNECTOR ASSE.MBLIES MUST BE -

RE-WORKED.OP REPLACED, IC 2421E SHALL u BE UTILIZED AS THE ASSEMBLY PROCEDURE. -

3. THE LITTON VEAM CONNECTOR AT THE- )

HACSS DISCONNECT PANEL FOR THE HJTC CABLING HAS BEEN RETROFTITED \\TTH A GRAFOIL GASKET TO ENSURE QUALIFICA' HON.

l l APPROVEQ .- ,

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[ I&C DEPT.

L MAINTENANCE .

  • li TASF*.: 1. REMOVAL AND RESINTALLATION OF HEAD l ,, CABLING.

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// 2. AU. ELECTRICAL TESTING AND TROUBLESHOOTING ACTIVITIES l

ASSOCIATED \;rrH THE HEAD CABLING.

. 3. RE-MAKE AND FE# INSTALLATION OF ,-

6 - -

CONNECTOR ASSEMBLIES AS DIRECTED  :

BY IC 2421E. ,

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-_ _ . . . . , - . . . , . . . _ _ , . , _ _ - . _ . , . _ _ , _ , _ . . , . _ . . . . _ _ . . . _ . r .. _ _. _. _ _ . , _

IC 2419C

  • age 2 Rev. O
1. OBJECTIVE (

KL.1. T o ve ri f y the integrity of the Heated Junction Thermocouple probe (HJTC) assemblies upon; i

1.1.1 Initial receipt of probe assemblies, or; 1.1. 2 Removal from the reactor head assembly pressure boundary, or; ,

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1.1.3 Reinstallation following refueling outages, j

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2. ACCEPTANCE CRITERIA

' ' ' ' "] ._

2.1 All temperature display readings, test voltages and continuity checks defined within this text meet the specified criteria.

3. TECHNICAL SPECIFICATION REFERENCES 3.1 None
4. PREREOUISITES 4.1 All required test equipment is available and within its

(..}f N' calibration frequency. ,

4.2 Access to the probe assemblies is available.

5. IHITIAL CONDITION 5  ;

5.1 The 55/SCO has authorized the test and has signed I&C Form -

2419C-1 or 2419C-2 as applicable.

5.2 120 Vac power is available at the test location. The HJTC test box requires this 120 Vac source power.

5.3 The necessary Radiation Work Permits (RWP) have been obtained if the probe checks are to be performed in a contaminated area.

6. PRECAUTIONS

/ 6.1 Use caution when working with the HJTC probe cabling and connectors. Do not bend or kink cabling.

6.2 Observe all RWP requirements, the HJTC probe assemblies are highly irradiated once installed and exposed to primary coolant.

6.3 Do not exceed 50 Vdc when performing insulation resistance checks.

(3/

M Concern The alleger's concern surrounds the operation of channel 'C' '

of the' reactor protection system. Specifically, the concern is the operation of the reference voltage output. The reference test voltage was not maintaining its acceptance -

criteria of +/ .003 vdc. The ref erenr.e test voltage is for the reactor protection system calculators for TMLP trip, RCS flow signal process, and for a DVM output at the RPS panel.

Recently, the alleger completed the RCS flow calibration under procedure SP-2404A. The u11eger submitted an ICR to document an out-of-specification for the test voltage output. The output values were 004 vde and +.005 vdc.

The alleger was questioning the orerability of channul 'C' of the RPS with historic out-of-spec test voltage outputs.

Historically, the alleger provided dates and times that the reference voltage was out-of-specification Enig Authorized Work Order 3/9/90 M2-90-02559 5/5/90 M; cc-o 7:e MC-90-05:0~

MC-90-05460 9

8/50 Surveillance for SP-2401F e ri SP-2401G Reference drawings are 25203-09069 sheet 40, and 05 00-25190 sheet 6 to identify the reference test voltage aoolication.

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